Choosing Cannabis Mylar Bags: Size & Compliance Guide

Choosing cannabis mylar bags sounds simple until you actually try to do it. You search for suppliers and get flooded with options: different sizes, finishes, thicknesses, closure types, and wildly different prices for what looks like the same bag. Some suppliers charge $0.30 per bag. Others charge $1.20 for something that looks identical.

The difference isn't visible in a product photo. It's in the construction. After 30 years in cannabis packaging, I can tell you that most brands are buying bags based on price and appearance, not on what the bag is actually made of. That's a problem, because a mylar bag that isn't properly constructed won't protect your flower from oxygen, moisture, or light. Your product degrades on the shelf and the customer blames your brand.

Here's how to choose cannabis mylar bags the right way, starting with what actually matters.

Multi-Layer Construction: Why Single-Layer Mylar Doesn't Work

A real cannabis mylar bag is not one layer of mylar. It's a multi-layer laminate. The construction you want is PET/AL/LLDPE: polyethylene terephthalate, aluminum foil, and linear low-density polyethylene.

Each layer does a specific job:

• PET (outer layer): Provides structural strength, printability, and temperature resistance. This is where your brand artwork goes.
• AL (aluminum foil, middle layer): The barrier. Aluminum foil blocks oxygen, moisture, and light. This is the layer that keeps your flower fresh. Without it, you don't have a real barrier bag.
• LLDPE (inner layer): Food-grade sealant layer. This is what makes the bag heat-sealable and provides the food-safe contact surface.

Here's why this matters: many suppliers sell bags labeled "mylar" that are actually single-layer metalized film. Metalized film has a thin vapor-deposited aluminum coating that looks like foil but doesn't provide the same barrier. It's cheaper, it's thinner, and it doesn't block oxygen the way real aluminum foil does. Your flower oxidizes faster. Terpenes degrade. The bag looks fine. The product inside doesn't.

When you're comparing suppliers, ask directly: "What's the layer construction?" If they can't answer PET/AL/LLDPE or won't specify the aluminum foil thickness in microns, you're probably looking at a metalized film bag sold as mylar. Our smell-proof mylar bags use proper multi-layer construction with real aluminum foil. That's why they actually block odor.

Choosing the Right Size

Mylar bag size determines how much product you can package and how the bag looks on a shelf. Here's a practical guide to common cannabis mylar bag sizes:

• 1g bags: Single-gram flower or pre-roll multipacks. Small, compact, minimal headspace. Good for premium flower strains where you want the customer to see value in the packaging.
• 3.5g (eighth) bags: The most common size for retail flower. If you sell eighths, this is your bread and butter. See our 3.5g eighth mylar bags for options designed specifically for this weight.
• 7g (quarter) bags: Quarter-ounce flower or smaller concentrate quantities. Less common than eighths but growing as consumers buy larger quantities.
• 14g (half-ounce) bags: Half-ounce flower, bulk concentrates, or multi-pack edibles. These bags need more structural support to hold weight without sagging.
• 28g (1oz) bags: Full ounce flower. The largest common retail size. Needs a strong zipper and thick enough material to hold weight without tearing.
• 1lb bags: Bulk packaging for B2B sales or large-quantity consumers. Not retail-facing in most cases. These need the thickest material construction.

The rule on size: match the bag to the product weight with minimal empty space. A 1g flower in a 28g bag looks cheap. A 28g flower crammed into a 14g bag looks unprofessional and stresses the seams. When in doubt, size down slightly for a snug, premium look.

Finishes: Matte, Gloss, Holographic, and Kraft

The finish you choose affects both aesthetics and shelf performance. Here's how they compare:

Matte finish

Matte is the most popular finish for premium cannabis brands right now. It reduces glare, which means your branding looks clean under dispensary lighting. Colors print softer and more sophisticated. Matte bags photograph better for social media. Downside: matte shows fingerprints more easily than gloss.

Gloss finish

Gloss makes colors pop. If your brand uses bright, saturated artwork, gloss will make it look more saturated. Gloss is also easier to wipe clean and resists fingerprints. Downside: glare under bright dispensary lighting can make it harder to read text on the package.

Holographic finish

Holographic adds a reflective, color-shifting effect to the bag surface. It catches attention on a shelf, which can help or hurt depending on your brand positioning. Premium brands tend to avoid holographic. Value brands and novelty products use it effectively. It costs more to produce.

Kraft finish

Kraft paper exterior with a mylar interior. This is the eco-positioned option. The kraft outer layer gives an organic, natural look that some brands prefer for their brand identity. The interior is still multi-layer mylar for barrier protection. Kraft bags work well for brands marketing sustainability, though the kraft exterior is less durable than PET in terms of puncture resistance.

Child-Resistant Options

If you're selling cannabis in any legal North American market, you need child-resistant packaging. Mylar bags can be made CR through a certified zipper closure that meets 16 CFR 1700.20 standards. For a full breakdown of CR testing and certification, see our guide to CR packaging requirements for cannabis brands. Not all zippers qualify. The CR zipper has to be tested and certified as part of the bag assembly, not just the zipper component alone.

Our child-resistant mylar bags come with full CPSC certification documentation. If a supplier tells you their bags are "CR-compliant" but can't produce the test certificate, they're either lying or uninformed. Either way, your brand takes the liability.

Print Effects and Custom Branding

Custom-printed mylar bags give you full control over branding. Here's what's available:

• Full-color CMYK printing: Standard for most bags. Gives you photographic quality artwork.
• Spot UV: Glossy raised areas on a matte bag. Creates tactile and visual contrast. Good for logos and brand names.
• Cold foil stamping: Metallic effects without the cost of hot foil. Silver and gold are most common.
• Embossing: Raised texture on the bag surface. Subtle but adds a premium tactile feel.

At CropPak, we don't sell blanks. Every bag is custom-printed. If you want to see what's possible, check our custom mylar bags page for print effect options and MOQ details.

MOQ Considerations and Factory-Direct vs. Broker Pricing

This is where most brands overspend. The cannabis packaging market has two tiers of suppliers: factories and brokers.

Brokers buy from factories and resell to you. They add a markup of 30% to 100% on top of factory pricing. They don't control production timelines, quality, or material specifications. When you have a problem, they call the factory and you wait.

Factory-direct suppliers like CropPak own the production relationship. You get one honest all-in quote with no hidden fees, same-day turnaround on most orders, and direct accountability for quality. The price difference between factory-direct and broker pricing on a 10,000-bag order can be $3,000 to $5,000.

Minimum order quantities (MOQs) vary by customization level:

• Stock sizes with custom print: typically 1,000 to 5,000 units.
• Custom sizes with custom print: typically 5,000 to 10,000 units.
• Specialty finishes (holographic, cold foil): typically 10,000+ units.

If a supplier quotes you a very low MOQ with a very low price, check the construction. They're probably cutting corners on material thickness or using metalized film instead of real aluminum foil.

Why Mylar Bags Are NOT Being Discontinued

There's misinformation circulating that mylar bags are being discontinued or banned. Let me address this directly.

Mylar bags are not being discontinued. Some jurisdictions are moving toward sustainability requirements for packaging materials, which may eventually require recyclable or compostable alternatives. New York has signaled this direction. But no state has banned mylar bags outright. The material itself (PET/AL/LLDPE) is widely used across food, pharmaceutical, and cannabis packaging globally.

What's happening is that some states are adding sustainability requirements that may affect how mylar bags are produced and disposed of. That's a material innovation challenge, not a ban. The mylar bag category is not going away. It's changing.

If you see a supplier claiming mylar bags are "being discontinued" and trying to sell you an alternative, that's a marketing tactic, not a regulatory reality. Do your homework and check the actual state regulations.