Check whether the belt attaches to trouser loops or closes around the waist with a hidden fastening.
Measure for the seller’s own chart, and leave adjustment room instead of keeping elastic at its longest stretch.
Try sitting and bending before wearing it out, watching for pressure and twisted trouser loops.
Release the belt after wear, let it dry naturally, and put the elastic away without tension.
Make a loose coil rather than stretching the strap around other items to hold them together.
Read the full guide to buckleless belt fastenings, comfortable sizing and relaxed elastic storage.