What size boxing gloves should I buy for training?

Most reviewers and general guidance point to 16 oz gloves for sparring and heavier bag work, 14 oz as a versatile all-rounder for adult training, and 12 oz for lighter individuals or focused bag/mitt sessions. Several listings here (notably the RDX) ship in a wide 8–18 oz range so you can match weight to your bodyweight and use case.