LK® 7F0304: 3″ × 4″ TUF-R® Standard LLDPE Flat Bags for Jewelry, Small Parts, and Retail Packaging
The LK® 7F0304 is a 3-inch by 4-inch clear LLDPE flat bag from the TUF-R® Standard line. The 3″ × 4″ dimension is one of the most commonly used small bag sizes across retail, craft, and parts packaging. It comfortably fits earrings with backing cards, small bracelets, single rings with packaging inserts, folded gift cards, battery packs, small electronic components, and similar items that need more depth than the square 7F0303 provides. The 3-inch width makes loading faster and easier in high-volume packing operations than the narrower 2-inch series. NFC Bags stocks 7F0304 in case quantities for businesses, retailers, and packaging operations requiring a reliable supply at this widely used small bag size.
Bag Specifications: 3″ × 4″, 0.9 Mil, Clear LLDPE, Open Top
Width: 3″. Length: 4″. Gauge: 0.9 mil. Film type: LLDPE. Color: clear. Opening: open top. Closure method: heat seal, fold-and-staple, twist tie, or adhesive label. FDA compliant for direct food contact. Recyclable. Sold per case.
3″ × 4″ Applications: The Most Versatile Small Flat Bag Across Multiple Industries
The 3″ × 4″ dimension serves a wider range of applications than almost any other small flat bag size. In jewelry and accessories retail, it accommodates standard earring cards, single-ring presentations, and small pendant packs with room for a backing card and price tag. In pharmaceutical and supplement packaging, it fits unit-dose sample packs, small blister card sections, and multi-tablet sample portions. In electronics and hardware, small connectors, fuses, cable clips, and fastener assortments fit cleanly. In food applications, single-serve candy, dried fruit portions, and spice samples are common uses. The 3-inch width opens easily for fast manual loading and seals cleanly on standard impulse sealers, making it compatible with both hand-pack and semi-automated packaging setups.
How 3″ × 4″ Flat Bags Became the Standard Size for Jewelry Retail and Small Parts Kitting
The 3″ × 4″ bag is ubiquitous in jewelry retail for a structural reason: standard earring display cards and pendant backing cards are typically 2 to 2.75 inches wide and 3 to 3.5 inches tall, and a 3″ × 4″ bag provides just enough width to hold the card flat without folding, and just enough depth to fit the card with the item attached and leave 0.5 inches above for a heat seal. This proportional match between standard retail card formats and the 3″ × 4″ bag dimension is why the size became the default in jewelry packaging — it’s not arbitrary; it was selected because it fits the card. The same dimensional logic applies in parts kitting: a 3″ × 4″ bag holds a standard parts label alongside small components with enough room to read the label through the clear film, making it the default for small parts identification bags in manufacturing kits and retail hardware displays. For the same reasons, it’s the most commonly restocked bag size in operations that package small items across multiple categories.
7F0304 vs. 7F0303 and 7F0305: Sizing Within the 3-Inch Series
The 7F0303 (3×3″) handles compact square-format items. The 7F0304 (3×4″) handles items that include a vertical card or product taller than they are wide. The 7F0305 (3×5″) handles items or insert combinations that need more depth than 4 inches. For most jewelry retail and small parts applications, the 7F0304 is the primary size; the 7F0303 is used for loose small items and the 7F0305 for taller items or items with long backing cards. All three are stocked at NFC Bags.
How to Order 7F0304 from NFC Bags
The LK® 7F0304 is available for direct purchase at NFC Bags in case quantities. No account setup, quote, or minimum order applies. Standard orders ship same business day. Volume pricing is available for high-volume users. Browse the full TUF-R® 7F flat bag series at NFC Bags.
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