I use discs in a lot of designs , earrings and necklaces . A wonderful set of my discs in graduated sizes with silvered glass edges. set of 15 glass discs made in transparent & opague pinks. Measurements are roughly 15mm to 22 mm diameter. Length of the strand Strung is roughly 8 cm. I prefer to string them so they are flat an example is the last photo you can see a tutorial on my website www.heartsongbeads.com .
Hole size 3 mm they are made on 3/32 mandrels