We have three different cord locks available:  Mini or Medium oval cord locks that fit 1/8" (3mm) cord as well as a Toaster Ellipse Cordloc that fits from 1/8" (3mm) to 5/16" (8mm) cord.  However the Mini best its the 2.5mm cord, especially if you wish to double the cord through the cord lock, for example when making zipper pulls.   NOTE:  Cord locks come from the manufacturer "locked".  To activate, squeeze down firmly and this should release the spring mechanism and make the cord locks ready for use.

We sell both 2.5mm and 3 mm elastic cord, also known as Shock Cord.  Click here: https://discoveryfabrics.com/products/shock-cord

Cord Locks are sold individually and are subject to shipping charges however, when ordered with other fabrics, their weight is minimal and will not affect your overall shipping charge.  Occasionally, we can send cordlocks on their own via letter mail with stamps (no tracking), so if you would like to see if this is possible for your order, send an email outlining what you want, and we'll let you know if it's possible..