Quality Snaps 60 snap sets Color: transparent Material: plastic Diameter: 1cm/ 0.4in; 1.3cm/ 0.51in; 1.5cm/ 0.59in; 1.8cm/ 0.7in Snaps well and holds. These are very firm "snaps." They click together very tightly. Easy to sew on. These are perfect nice and small but very sturdy and easy to sew on. They don't pop open easily, even under strain. Indeed, it takes some effort to unsnap them. They're firm without being hard to open. Holes are easy to hand sew with normal needle sizes. Not too thick, not too thin, these are easy to stitch on and keep a low profile, but also durable through several washes. Perfect for fastening a book cover, tote bag, purse, coat, jacket---anything that requires a large, sturdy snap.