A 30ml CBD oil bottle usually fits into a box that measures 1.25″ x 1.25″ x 4″ to 1.5″ x 1.5″ x 4.25″ (about 32–38mm × 32–38mm × 100–108mm). The exact box size depends on the bottle shape, dropper length, and whether a custom insert is needed.

Most packaging suppliers recommend:

• 32×32×100mm for standard round glass bottles

• 35×35×105mm for premium bottles with longer droppers

• 38×38×108mm for bottles packed with a paper insert or extra protection

If you want a tight, minimalist fit, choose the smaller size. If your bottle has a longer dropper or requires cushioning, choose one of the larger sizes.