Plastic Buckle: How Are Buckles Measured?

Some beginner to the world of buckles may be not sure about how to measure the size of buckle and may ask “Which buckle size should I use?”, this question is what we are frequently asked by our customers.

Please note: the size of buckles are not determined by their exterior dimension, they are measured by interior dimension, i.e. side release buckles, tension locks, and slide buckles are measured by the inner widths, when it comes to cord stopper or horn toggle button, we have to check out the cord diameter and find out cord lock with suitable hole diameter.

side release buckle with inner width marked



Common Sizes

The most common sizes that frequently be used in our daily life including 8 mm, 10 mm, 1/2”, 5/8”, 3/4”, 1”, 1-1/4”, 1-1/2”, 1-3/4”, and 2 inch, please take references of below : 

(Mobile phone browser, please swipe the table to the right for more information)

mm inch Apply to...
8 7/16 badge holder, neck lanyard
10 3/8 cat collar & harness, bow tie, nursing bra
12 1/2 parachute bracelet, glove & mitten
5/8 15 pet collar, bag strap
3/4 20 backpack strap, pet collar
1 25 dog collar, baby harness, life jacket
1-1/4 32 work apron, outdoor equipment
1-1/2 38 collar for large dog, shoulder bag
1-3/4 44 orthopedic restraint
2 50 travel bag, fanny pack


I.e. if your webbing width is 15 mm, refer to the above table, your webbing can then fit in buckles with 5/8" inner width.


However, inner width is not the only key element when we are selecting the buckles, if the webbing is thicker, then we have to use slide buckles with larger inner length, i.e. although the design and inner width of our slide buckle B1 and wide mouth style B3 is quite similar, B3 can pass through thicker because of larger inner length, please check below :

plastic-slide-buckle-B1-black-pom
B1 Slide Buckle

plastic-wide-mouth-slide-buckle-B3-black-pom
B3 Wide Mouth Slide Buckle



Hope that above guide could help you find out the appropriate size of buckle, i
f you have any further question, please feel free to let us know.

For any product information, please contact us with below information:

Tel: +886-4-8355057

Address: No.98, Ln. 6, Sec. 1, Zhongshan Rd., Dacun Township, Changhua County 51545, Taiwan (R.O.C.)

E-mail: lulu@ji-horng.com.tw


Check out our plastic buckles & bag accessories now at https://www.ji-horng.com/product.htm