Small Dollar Tree Lid Frame - Measures 3.55" round and fits 3" inserts. The jars can be purchased online or in store: https://www.dollartree.com/classic-counter-top-gla...
Large Hobby Lobby Lid Frame - Measure 4.35" round and fits 3.75" inserts. The jars can be purchased online or in store: https://www.hobbylobby.com/Crafts-Hobbies/Glass-Cr...
The smaller mason jar frame measures out at 3.15" inches round. This size works on standard size Mason Jar Lids, and the 2.5" round inserts work for this lid size.
The Wide Mouth Mason Jar frame measures out at 3.75" round and uses the 3" round inserts.