Good question! It can be confusing.
On rings & slide adjusters, we refer to their sizes by inside diameter.
Buckles are sized by the width of strapping that would go through them.
We categorize our snap hooks by the inside width of the top loops (where strapping would go).
Rivets are usually shown by head diameter and post length.
Grommets & eyelets are measured by inside & outside diameters, as well as flange depths (depending on the thickness of the material on which you’re installing them).
Four-part snaps have different eyelet/post lengths and cap diameters.
Individual replacement wheels are categorized by the diameter across the center of the wheel, and by thickness.
Zippers are categorized by material type and industry-standard sizes

You can just contact us if you are interested in a custom order. We will do our best to see if we can meet your requirements.

We only ship items UPS Ground. We charge a low flat fee of $12.50 no matter how many items that you order. We do hope to encourage you to purchase enough product to make it worthwhile for both you and us. Our orders Ship out the same or next business day. Please note that there are certain items, due to size, that may require an additional shipping charge. If you ever need the order expedited or if you prefer a certain method of shipping, you may request that but additional shipping charges will apply.