Tumbled stone: Size and Quantity
Tumble polished stones are graded by sieving and sizing is therefore only approximate.
Extra Small (XS) are about 6-10mm (Average 25 stones per 5cms pot).
Small (S) are about 10-15mm (Average 110 stones per 250gms)
Medium (M) are about 15-20mm (Average 50 stones per250gms).
Large (L) are about 20mm and larger (Average 24 stones per 250gms)