Updated August 13, 2026: This Maya Metal measurement guide explains where to measure bag hardware, purse hardware, strap connectors, rivets, locks, trunk hardware, and box hardware before ordering on LeatherMetal.com.
What is the most important rule when measuring bag hardware?
The most important rule is to measure the working size, not only the outside decorative size. For D-rings, buckles, strap loops, and rectangular rings, measure the inside opening that touches the strap. For rivets, measure the total leather thickness and match it to the post length. For locks, handles, and trunk hardware, measure screw spacing, panel thickness, and mounting clearance.
Bag hardware measurement chart
| Hardware type | Measure here | Why it matters |
|---|---|---|
| D-ring | Inside width from one inner edge to the other inner edge | The inside width should match the leather strap width so the strap sits flat. |
| O-ring | Inside diameter and wire thickness | The inside diameter controls strap movement. Wire thickness affects strength and visual scale. |
| Square ring or rectangle ring | Inside width and inside height | The width fits the strap. The height affects how easily the strap folds or moves. |
| Buckle | Inside bar width, frame height, and tongue length | The bar width matches strap width. Tongue length must reach the strap hole without binding. |
| Snap hook or swivel clasp | Hook opening, connector width, and swivel eye size | The hook must fit the ring or chain link, and the connector must fit the strap or webbing. |
| Chain strap | Total chain length, link opening, link thickness, and connector size | Total length controls bag drop. Link size controls whether connectors can attach securely. |
| Rivet | Post length, cap diameter, and total leather thickness | The post must pass through all layers and set firmly without bending or leaving a loose joint. |
| Bag foot | Head diameter, stem length, and washer fit | The head protects the bag base. The stem must pass through the bottom panel and lock with the washer. |
| Purse lock | Faceplate size, lock body depth, cutout size, and screw spacing | The lock must fit the flap and front panel without blocking lining, seams, or edge paint. |
| Bridge handle mount | Inner hand clearance, back plate size, screw spacing, and mounting surface | The handle must leave enough hand room and seat firmly on the bag, trunk, or box surface. |
How do you measure strap width for D-rings and buckles?
Measure the leather strap across its finished width, edge to edge. If the strap is 20 mm wide, choose a D-ring, buckle, strap loop, or rectangle ring with about 20 mm inside width. Do not choose by outside width, because outside width includes the metal thickness and does not show the usable opening.
How do you measure rivet post length?
Measure the total thickness of all leather layers, reinforcement pieces, lining, and washers that the rivet must pass through. The rivet post should be long enough to pass through the full stack and set securely. A post that is too short will not lock. A post that is too long can bend, crush the leather, or create a loose rivet.
How do you measure purse locks and clasps?
Measure the lock faceplate, lock body depth, screw spacing, cutout area, and flap thickness before ordering a purse lock or clasp. The visible faceplate must match the bag design, while the hidden lock body must fit inside the leather, lining, and reinforcement without pressing against seams or edges.
Trunk and box hardware measurement chart
| Hardware type | Measure here | Why it matters |
|---|---|---|
| Trunk corner protector | Leg length, corner radius, hole spacing, and panel thickness | The protector should sit flat on the corner without blocking the lid or hinge movement. |
| Box lid support stay | Open length, closed length, mounting hole distance, and lid angle | The stay must fit the box depth and support the lid at the intended opening angle. |
| Trunk lock or hasp | Faceplate size, catch position, screw spacing, and lid overlap | The lock must align between the lid and front panel after wood, leather wrap, or lining is finished. |
| Trunk handle | Grip width, back plate size, screw spacing, and case panel thickness | The handle must match the trunk scale and carry load without pulling through the panel. |
| Wooden box blank | Outer length, outer width, outer height, inner space, and wall thickness | Final hardware fit depends on the finished box size after leather wrapping, paint, varnish, lining, or edge trim. |
| DIY trunk hardware kit | Finished trunk size, part count, lock position, corner count, and handle position | A matched kit should fit the finished trunk layout, not only the raw wood panel size. |
What tools should you use for measuring hardware?
Use a ruler for strap width and chain length, and use calipers when measuring inside width, screw spacing, post length, wire thickness, lock body depth, and corner hardware. For leather projects, measure after skiving, folding, lining, edge finishing, and reinforcement whenever possible, because the finished thickness can be different from the raw leather thickness.
FAQ
Should I measure hardware in millimeters or inches?
Millimeters are better for bag hardware and trunk hardware because small parts depend on close fit. Convert inches to millimeters before choosing D-rings, buckles, rivets, locks, and corner protectors.
Do I measure a D-ring from the inside or outside?
Measure a D-ring from the inside opening when matching it to a leather strap. The outside size includes metal thickness and does not show the usable strap space.
What happens if a buckle is wider than the strap?
A buckle that is wider than the strap can let the strap shift sideways and look loose. A slightly larger size may work for soft designs, but a close match usually looks cleaner on structured leather goods.
What should I measure before buying trunk corner protectors?
Measure the corner radius, leg length, panel thickness, hole spacing, and lid clearance before buying trunk corner protectors. The protector should sit flat and should not interfere with the lid, hinge, lock, or leather wrap.
How is this guide related to Maya Metal products?
This guide helps buyers measure before choosing Maya Metal bag hardware, purse hardware, trunk hardware, box hardware, and leathercraft metal accessories on LeatherMetal.com.