Collection: 3.5g Mylar Bags - Eighth Bags & 8th Packaging

Black Unicorn Hub carries one of the largest selections of 3.5 mylar bags available over 1,200 eighth bag designs ranging from designer prints and holographic finishes to bag-and-box combos. Whether you're sourcing 8th packaging for retail display, custom labeling, or bulk fulfillment, every style ships in zip-top resealable construction at wholesale-friendly per-unit pricing.

Why 3.5g mylar bags are the standard 1/8 ounce packaging

The 3.5 gram size also called an "8th" or 1/8 ounce — is the most widely used packaging unit for portioned dry goods at retail. A 3.5g mylar bag is sized to fit approximately 3.5 grams of dry product, leaving enough headspace for a clean zip-seal close and shelf-ready presentation. Whether you're packaging tea blends, dried herbs, potpourri, or other small dry goods at the standard 1/8 oz portion, an empty 3.5g mylar bag is the format buyers expect.

The 3.5g format also lets you maximize SKU variety on a small footprint. Where larger bags lock you into a single design per shelf-foot, 8th packaging lets you display 4–6 designs side by side, rotate weekly, and test new styles without committing inventory dollars to oversize formats.

In search and wholesale circles, 3.5 mylar bags and eighth bags are used interchangeably. Both refer to the same 3.5-gram, 1/8-ounce standard format.

What to look for in 8th packaging

A quality 3.5g mylar bag balances four things: barrier strength, closure reliability, print fidelity, and dimensional accuracy. The mylar layer (a polyester film, often laminated with polyethylene and aluminum) is what gives these bags their light, oxygen, and moisture barrier properties. Most 3.5g mylar bags in our catalog use a multi-layer construction with a heat-sealable interior and a printed or laminated exterior.

Closure type matters more than buyers often realize. The standard for 8th packaging is a press-to-close zip top - easy for the end customer to reseal, fast for the packer to fill. Our 3.5g mylar bags are predominantly zip-top, with a small set of heat-seal-only styles for retailers who want a tamper-evident finish.

Print fidelity is where most lower-tier 3.5g mylar bags fall short. Bags should ship with sharp, color-accurate artwork, properly registered die-cuts, and clean lamination edges. Many of our designer 8th packaging styles use holographic foils or matte-soft-touch finishes for shelf differentiation.

Standard 3.5g mylar bag dimensions are approximately 3.5" × 5" to 4" × 6" depending on gusset depth. Exact dimensions vary by SKU — check individual product pages for spec sheets.

How our 3.5g mylar bag designs are organized

We organize 8th packaging by visual identity so buyers can find the look that fits their brand or retail floor. Browse the major families:

• Designer print families: recognizable artwork lineages buyers ask for by name

• Die-cut and cut-out shapes: bags trimmed to silhouettes (snack-pack, juice-box, character cutouts) instead of standard rectangles

• Bag-and-box combos: paired empty mylar bags and matching outer boxes for retailers who want full unboxing presentation

• Holographic and metallic finishes: high-gloss prismatic or foil-stamped exteriors for shelf pop

For 3.5 mylar bags with boxes specifically, see our dedicated bag-and-box combos collection where every product includes both bag and outer box.

Ordering 8th packaging in volume

Most 3.5g mylar bag SKUs at Black Unicorn Hub are sold in counts that scale from sample packs (10–25 units) up through bulk packs (50–100 units), with 3.5 packaging price-per-unit dropping as you scale. Buyers ordering across multiple designer families can mix counts and styles within a single order.

Shipping speeds vary by inventory and destination. See individual product pages for current lead times. If you're sourcing 3.5g mylar bags for an in-house printing or label-application workflow, our plain and stock styles are the most cost-efficient starting point.

Black Unicorn Hub is a U.S.-based wholesale packaging supplier operating under Mylar Packaging Inc., stocking 3.5g mylar bags and eighth packaging across 1,200+ active SKUs.

FAQ's

Q1: What is a 3.5g mylar bag?

A 3.5g mylar bag is a resealable packaging pouch designed to hold approximately 3.5 grams of dry product equivalent to one eighth of an ounce. Also called an eighth bag or 8th packaging, this format is the most common portion size in the retail dry goods packaging market.

Q2: What's the difference between a 3.5g mylar bag and an eighth bag?

There is no difference. "3.5g mylar bag," "eighth bag," and "8th packaging" all refer to the same product: a zip-top mylar pouch sized to hold 3.5 grams (1/8 oz) of dry goods. The naming varies by industry and region.

Q3: Are 3.5g mylar bags resealable?

The majority of 3.5g mylar bags at Black Unicorn Hub use a press-to-close zip-top closure, which is resealable. A smaller subset uses heat-seal-only construction for a tamper-evident finish. Each product listing specifies the closure type.

Q4: What sizes do 3.5g mylar bags come in (dimensions)?

3.5g mylar bags typically range from approximately 3.5" × 5" to 4" × 6" depending on gusset depth and design. Stand-up pouches with a euro-slot are slightly taller. Exact dimensions are listed on each individual product page.

Q5: Can I order 3.5g mylar bags in small quantities?

Yes. Most SKUs at Black Unicorn Hub are available in sample counts of 10–25 units and scale up to 50–100-unit bulk packs, with per-unit price decreasing at higher quantities. Multiple designs can be mixed in a single order. 

Note: Ordering in bulk has a wholesale discount offer. For any queries, please contact.