The hole diameter is approx. 1.2 mm, compatible with most nylon jewelry wires (0.5 to 1 mm), cabled wires and standard elastic wires. For needle weaving, prefer a fine thread such as Nymo or C-Lon.
Absolutely. The combination of different sizes (e.g. 4 mm + 8 mm) is a classic graduation technique that lends relief and movement to a necklace or bracelet. Identical finishes between sizes (e.g. Crystal Golden Shadow) ensure visual consistency.