Durable Black Bag Stiffeners

Durable Black Bag Stiffeners – 42cm x 29.5cm x 1.5mm.

(16-9/64" x 11-39/64" x 3/64") – Plastic Sheet Insert for Bags and Cases.

Give your handmade leather bags and accessories the structure and support they deserve with these Durable Black Bag Stiffeners. Made from tough yet flexible plastic, these stiffener sheets are ideal for reinforcing the shape of tote bags, satchels, briefcases, clutches, and other structured leather goods.

Each sheet measures 42cm x 29.5cm (approximately 16-9/64" x 11-39/64") with a thickness of 1.5mm (3/64"), making it easy to cut or trim to size for your specific project. The matte black finish blends discreetly into your bag lining and can be sewn, glued, or inserted into hidden pockets, depending on your construction method.

Stiffeners like these are especially useful for adding rigidity to bag panels, preventing sagging, and helping your finished product maintain its shape and form over time. Whether you're building custom leather handbags, structured pouches, or heavy-duty field gear, these inserts improve function, durability, and professional finish.

Features:

• Size: 42cm x 29.5cm x 1.5mm (16-9/64" x 11-39/64" x 3/64").
• Material: High-quality plastic – firm but easy to trim or cut.
• Color: Matte black – discreet and professional inside finished products.
• Provides structure and reinforcement to leather bags, cases, and accessories.
• Ideal for bag bottoms, sides, flaps, or divider panels.
• Compatible with sewing, adhesive bonding, or slip-in liner constructions.
• Resists bending, creasing, and deformation over time.
• Lightweight but rigid – adds support without unnecessary bulk.

An essential addition to any leather bag-making project, these Durable Black Bag Stiffeners offer a simple way to elevate the functionality and appearance of your creations. Built to support—and built to last.