I was very excited about these as I have a number of bras that I love but which are now a bit loose for me, so I thought these might extend their lifespan a little. However, the gap for inserting the bra strap is not wide enough, so either the material has to be scrunched into it as the bra widens, and even then, the bra is only tightened by a few millimetres, so not really fit for purpose, unfortunately. The will be fine for extending bras if that's what you're looking for, but I won't be getting much use out them :/