These are bands are too big for coin gaffs. They are perfect for tricks like Yarn or Crystal Tube, they are 7.94mm ( 5/16") in diameter and can stretch out to as much as 70mm (2 3/4") at absolute full stretch.
The are clear and transparent, making them much less visible.
Please note that these bands are NOT made from latex! So if you have a latex allergy, YOU WILL BE SAFE WITH THISE BANDS!