Diameter of drill: 3mm, length of attached item (assuming):100mm, width: 60mm, height: 20mm.
Length100mm ÷ 3mm =34 capsules.
Width 60mm ÷ 3mm =20 capsules.
Height 20mm ÷ 3mm =7 capsules.
The amount of drilling used for sticking drilling items:
Front and back dosage: 34 capsules ×20 capsules =680 capsules.
34 capsules on left and right sides ×7 capsules =238 capsules.
20 capsules on upper and lower sides ×7 capsules = 140 capsules.
Just do the math yourself. Don't buy less. Generally, sellers sell 200 pieces, which is quite a lot to imagine, but sticking a shell costs at least 1000 pieces. Generally, 3mm stickers are used. You don't need too many diamonds for this kind.