Guide for Choosing Thread Size
Thread Size Applications 69/69.................Lightweight leather, belts, purses, etc. ... up to 8 ounce 138/69.................Recommend for leather up to 10 ounce. Shoe and garment repair 207/207..............Medium weight leather products such as leashes, haulters, bridles, etc. 277/207..............Use for projects from 3/16” to 1/2” in thickness. 277/277..............Heavy weight leather or nylon.... from 1/2” to 5/8” thick. 346/277..............Heavy weight leather or nylon.... from 5/8” to 7/8” thick.
