9 Compostable Bag Sizes Compared by Volume

Compostable bags come in nine common size categories, each designed for specific applications. From the smallest 1-gallon kitchen pail liner to the largest 64-gallon commercial trash bag, the volume affects pricing per bag, durability requirements, intended use case, and composter acceptance criteria. A foodservice operator running a comprehensive sustainability program may use 4-6 different bag sizes across different waste streams (small kitchen pail, medium prep bin, large back-of-house bin, jumbo commercial collection); a household typically uses 2-3 sizes (countertop bin liner, outdoor compost cart liner, sometimes a larger event-size bag).

Choosing the right bag size affects cost, operational fit, and end-of-life outcome. Too-small bags need frequent emptying and exhaust budget on bag costs. Too-large bags develop heavy loads that may tear, leak, or exceed composter handling capacity. Bags that are sized for a specific waste stream perform best.

This guide walks through the nine common compostable bag size categories: dimensions, volume capacity, typical uses, pricing tiers, brand options, durability ratings, and the operational considerations for each. The information is drawn from foodservice procurement experience and supplier catalogs from major compostable bag brands.

Size 1: 1-Gallon Kitchen Pail Liner

The smallest standard:

Dimensions: Roughly 7×12 inches when flat; 4x4x6 inches when shaped
Capacity: 1 gallon (~4 liters)
Common uses:
– Countertop compost pail liner
– Small office desk bin
– Bathroom small bin (for compostable tissue)
– Pet waste collection

Pricing:
– Wholesale: $0.04-0.08 per bag
– Retail: $0.08-0.15 per bag
– Premium: $0.15-0.30 per bag (specialty thicker bags)

Brands:
– BioBag standard 1-gallon
– World Centric small kitchen bags
– Stalk Market 1-gallon
– Various private-label

Durability:
– Standard 1.0-1.2 mil thickness
– Holds about 4 lbs of compost
– Tears if overfilled

Use case fit:
– Households emptying daily or every-other-day
– Light vegetable waste
– Easy bin replacement

For most household kitchens, this is the standard countertop bin liner.

Size 2: 2.5-Gallon Small Bin Liner

Step up for medium kitchen bins:

Dimensions: 11×13 inches
Capacity: 2.5 gallons (~9.5 liters)
Common uses:
– Larger kitchen countertop bin
– Small under-counter bin
– Small office bin
– Light commercial pail

Pricing:
– Wholesale: $0.06-0.12 per bag
– Retail: $0.10-0.20 per bag

Brands:
– BioBag 2.5-gallon
– World Centric medium bags
– Various brands

Durability:
– Standard 1.2-1.5 mil thickness
– Holds 8-10 lbs of compost
– Better for wetter materials

Use case fit:
– Households with 2-3 person size
– Cooking-heavy households
– Empty every 2-4 days

For households with substantial cooking, the 2.5-gallon size reduces emptying frequency.

Size 3: 3-Gallon Medium Bin Liner

Standard medium size:

Dimensions: 17×18 inches
Capacity: 3 gallons (~11 liters)
Common uses:
– Office kitchenette
– Small restaurant under-counter
– Light foodservice prep
– Smaller commercial collection

Pricing:
– Wholesale: $0.08-0.15 per bag
– Retail: $0.12-0.25 per bag

Brands:
– BioBag 3-gallon
– World Centric 3-gallon
– Eco-Products 3-gallon
– Specialty brands

Durability:
– 1.5-1.8 mil thickness typical
– Holds 12-15 lbs
– Good for mixed waste

Use case fit:
– Small offices
– Café back-of-house
– Specific moderate-volume applications

Size 4: 7-Gallon Small Trash Bag

Crossover size:

Dimensions: 22×24 inches
Capacity: 7 gallons (~26 liters)
Common uses:
– Office bathroom small trash
– Restaurant guest area bin
– Hotel room compost bin
– Small commercial collection

Pricing:
– Wholesale: $0.10-0.20 per bag
– Retail: $0.18-0.35 per bag

Brands:
– BioBag 7-gallon
– World Centric 7-gallon
– Stalk Market 7-gallon
– Various restaurant supplier brands

Durability:
– 1.5-2.0 mil thickness
– Holds 20-25 lbs
– Standard for guest areas

Use case fit:
– Office bathrooms
– Restaurant guest area
– Hotel rooms (for organics-collecting programs)

For most commercial guest-area applications, 7-gallon is standard.

Size 5: 13-Gallon Kitchen Bag (Tall Kitchen)

The most common consumer size:

Dimensions: 24×28 inches
Capacity: 13 gallons (~49 liters)
Common uses:
– Standard household kitchen
– Office trash bins
– Restaurant prep area bins
– Garage compost bin

Pricing:
– Wholesale: $0.12-0.25 per bag
– Retail: $0.20-0.40 per bag

Brands:
– BioBag tall kitchen
– World Centric 13-gallon
– Stalk Market tall kitchen
– All major compostable bag manufacturers

Durability:
– 1.8-2.2 mil thickness
– Holds 35-45 lbs
– Adequate for most household waste

Use case fit:
– Standard household kitchens
– Office workstations
– General commercial use

This is the workhorse size for most household and small commercial applications. Most compostable bag inventory at retailers is this size.

Size 6: 18-Gallon Medium Trash

For larger spaces:

Dimensions: 30×36 inches
Capacity: 18 gallons (~68 liters)
Common uses:
– Larger household garages
– Office break room trash
– Restaurant guest area large
– Small commercial collection

Pricing:
– Wholesale: $0.18-0.32 per bag
– Retail: $0.30-0.50 per bag

Brands:
– BioBag 18-gallon
– World Centric 18-gallon
– Specific commercial suppliers

Durability:
– 2.0-2.5 mil thickness
– Holds 60-70 lbs
– Better for heavy waste

Size 7: 30-Gallon Large Trash

Commercial-scale:

Dimensions: 33×40 inches
Capacity: 30 gallons (~114 liters)
Common uses:
– Restaurant back-of-house bin
– Commercial kitchen prep waste
– Event waste collection
– Larger office trash

Pricing:
– Wholesale: $0.30-0.60 per bag
– Retail: $0.50-0.90 per bag

Brands:
– BioBag 30-gallon
– World Centric 30-gallon
– Foodservice-focused brands
– Restaurant supplier brands

Durability:
– 2.5-3.0 mil thickness
– Holds 100-130 lbs
– Heavy-duty for commercial use

Use case fit:
– Restaurant operations
– Catering events
– Specific commercial applications

For most foodservice back-of-house operations, 30-gallon is standard for kitchen prep waste collection.

Size 8: 45-Gallon Commercial

Larger commercial:

Dimensions: 40×46 inches
Capacity: 45 gallons (~170 liters)
Common uses:
– Restaurant commercial collection
– Cafeteria back-of-house
– Stadium guest area collection
– Specific event venues

Pricing:
– Wholesale: $0.45-0.85 per bag
– Retail: $0.70-1.30 per bag

Brands:
– BioBag 45-gallon
– World Centric 45-gallon
– Stalk Market commercial
– Specific foodservice brands

Durability:
– 3.0-3.5 mil thickness
– Holds 150-200 lbs
– Heavy-duty commercial

Use case fit:
– Larger restaurant operations
– Stadium and venue waste collection
– Commercial composting collection
– Substantial daily waste volumes

Size 9: 64-Gallon Jumbo

Largest standard:

Dimensions: 50×60 inches
Capacity: 64 gallons (~242 liters)
Common uses:
– Restaurant outdoor compost cart
– Stadium central collection
– Industrial composting collection
– Specific large-event venues

Pricing:
– Wholesale: $0.80-1.50 per bag
– Retail: $1.20-2.20 per bag

Brands:
– BioBag 64-gallon
– World Centric 64-gallon
– Specific industrial brands

Durability:
– 3.5-4.0 mil thickness
– Holds 250-350 lbs
– Heavy commercial duty

Use case fit:
– Industrial composting collection
– Stadium and large event central
– Commercial operations at scale

For most operations, 64-gallon is the largest size needed. Larger operations may use specialty roll-off bins instead of bags.

Cross-Size Comparison

For typical operations, the bag size distribution:

Household:
– 1-gallon countertop liner (daily)
– 13-gallon main kitchen (weekly)

Small restaurant:
– 1-gallon countertop (cooking station)
– 13-gallon under-counter
– 30-gallon back-of-house
– 45-gallon outdoor commercial cart

Multi-location restaurant chain:
– 13-gallon for guest areas
– 30-gallon for prep
– 45-gallon for back-of-house
– 64-gallon for outdoor commercial

Stadium operations:
– 13-gallon at concession areas
– 30-gallon at central collection
– 45-gallon at large collection points
– 64-gallon for industrial composter pickup

Material Variations

Beyond size, compostable bags vary by:

PLA-blend bags:
– Translucent or white
– Industrial compostable
– Most common type

PHA-based bags:
– More opaque
– Home compostable in some formulations
– More expensive

Starch-based bags:
– Plant starch with binding polymers
– Variable home/industrial compostability
– Specific brands

Modified cellulose film:
– Compostable in industrial conditions
– Specific specialty uses

For most procurement, the choice between PLA-blend (industrial only) and PHA (potentially home compostable) depends on disposal infrastructure.

Pricing Per Volume

To compare cost across sizes:

Cost per gallon of capacity (wholesale, mid-tier):

• 1-gallon: $0.06 per gallon
• 2.5-gallon: $0.04 per gallon
• 3-gallon: $0.03 per gallon
• 7-gallon: $0.02 per gallon
• 13-gallon: $0.015 per gallon
• 18-gallon: $0.015 per gallon
• 30-gallon: $0.015 per gallon
• 45-gallon: $0.014 per gallon
• 64-gallon: $0.013 per gallon

The per-gallon cost decreases with size. Larger bags are more cost-effective per unit volume. However, this should be balanced against operational fit — larger bags than needed waste material and may not fit available bins.

Brand Quality Comparison

Across major compostable bag brands:

BioBag:
– Wide size range
– Industry-leading compostability certifications
– Premium pricing
– Reliable consistency

World Centric:
– Comprehensive size range
– BPI certified
– Mid-tier pricing
– Good quality

Stalk Market:
– Major size range
– Foodservice focus
– Competitive pricing
– Specific bagasse and PLA products

Eco-Products:
– Strong brand recognition
– Wide product line
– Mid-premium pricing
– Established quality

Specific private-label:
– House brands from major distributors
– Variable quality
– Competitive pricing
– Useful for cost-focused operations

For most procurement, choosing a single primary brand simplifies inventory; specific situations may warrant brand variations.

Procurement Considerations

For ordering compostable bags:

Volume ordering:
– Most suppliers offer 200-1,000 unit cases
– Smaller commercial orders 100-500 units
– Larger orders custom-priced

Storage:
– Bags store well in cool, dry conditions
– 18-24 month shelf life typical
– Avoid direct sunlight (UV degrades plastic)

Lead time:
– Stocked items: 1-3 days from major distributors
– Specific custom items: 2-4 weeks
– Specific private-label: longer

Certifications:
– BPI for industrial composting
– TUV Austria HOME COMPOST for home composting
– Specific composter acceptance requirements

For most operations, established supplier relationships with one or two major brands cover the size range needed.

Composter Acceptance Considerations

Different composters accept different bag types:

Standard industrial composters:
– Generally accept BPI-certified compostable bags
– May reject excessive bag content (creates “compostable film” in finished compost)
– Specific acceptance policies

Specific municipal organics programs:
– Vary widely by city
– Some require specific brands or certifications
– Some prefer no bags (loose collection)

Backyard composting:
– Smaller volumes
– Most bags break down in active piles
– Home-compostable certifications specifically apply

Compost Manufacturing Alliance Field Tested:
– Specifically vetted bags accepted by participating composters
– More reliable composter acceptance signal

For specific operations, verifying composter acceptance for chosen bag brands before bulk procurement is essential.

Specific Use Case Patterns

For common operations:

Restaurant kitchen prep:
– 1-gallon for cutting boards (collected to large bin)
– 13-gallon under-counter (frequent emptying)
– 30-gallon for back-of-house collection
– 45-gallon for outdoor commercial cart

Office building waste:
– 1-gallon for individual desk bins
– 13-gallon for kitchenette
– 30-gallon for break room
– 45-gallon for central commercial collection

Hotel operations:
– 1-gallon for guest room compost bin
– 13-gallon for housekeeping cart
– 30-gallon for kitchen
– 64-gallon for central composting collection

Stadium operations:
– 13-gallon at individual concession stands
– 30-gallon at section collection
– 45-gallon at concourse collection
– 64-gallon at central waste collection

For each operation, the bag size selection follows the waste flow from generation point to disposal endpoint.

When Specific Sizes Don’t Apply

A few situations:

Very specific volume requirements:
– Specialty applications
– Specific industrial requirements
– Custom-sized bags from suppliers

Specific composter requirements:
– Some composters require specific bag types
– Facility-level specifications vary
– Verify before procurement

Specific climate considerations:
– Cold storage may affect bag flexibility
– Heat may affect specific brands
– Specific storage requirements

Specific specific cost constraints:
– Smaller operations may find conventional plastic acceptable
– Specific premium tiers
– Specific decision factors

For most operations, the standard size categories cover requirements. Specific edge cases require custom solutions.

Specific Resources

For compostable bag procurement:

• Webstaurantstore — major US supplier with multiple sizes
• BioBag direct — comprehensive size catalog
• World Centric direct — full compostable line
• Restaurant Depot — wholesale tier
• Sysco / US Foods — major distributors

For verification:

• BPI website — industrial composting certification verification
• TUV Austria — European compostability certification
• Compost Manufacturing Alliance — composter acceptance verification

For specific brand information:

• Brand sustainability pages — material composition
• Customer reviews — practical experience
• Specific product specifications — technical details

The Bottom Line

Compostable bags come in nine standard size categories, ranging from 1-gallon countertop liners to 64-gallon commercial collection bags. Each size serves specific applications, and per-gallon pricing decreases with size — larger bags are more cost-effective per unit volume.

For typical procurement decisions:

• Households: 1-gallon countertop + 13-gallon main kitchen typically sufficient
• Small restaurants: 1-gallon prep + 13-gallon under-counter + 30-gallon back-of-house
• Larger commercial: 13-gallon prep + 30-gallon collection + 45-gallon outdoor + sometimes 64-gallon central
• Major venues: All sizes used across operations

The brand choice (BioBag, World Centric, Stalk Market, Eco-Products, private-label) affects price and quality. The certification verification (BPI, TUV Austria, CMA) affects composter acceptance. The size choice affects operational fit and per-bag cost-effectiveness.

For most operations, the practical workflow is:

• Inventory current bin sizes
• Calculate weekly bag usage by size
• Order from established compostable bag supplier
• Verify composter acceptance for specific products
• Maintain reasonable inventory buffer

The total annual compostable bag spend ranges from $50-200 for households to $500-50,000+ for large operations. The premium over conventional plastic bags runs 50-150% but is generally manageable within sustainable waste management programs.

For broader sustainability practice, compostable bags are one piece of larger waste management. The bag enables the compostable waste to reach the composter cleanly. Without compostable bags, organic waste contamination of conventional trash often makes composting impractical. The bag is the small enabling investment that makes the larger composting program work.

For most readers, the practical takeaway: identify your bin sizes, choose the matching compostable bag sizes, source from established suppliers, verify composter acceptance, and integrate into routine waste management. The decision is more about operational fit than fundamental availability — good options exist at every size and price tier.

For B2B sourcing, see our compostable supplies catalog or compostable bags catalog.