The three major types of bandages are: roller bandages, tubular bandages and triangular bandages.

A roller bandage is used to secure a dressing in place.

A triangular bandage is used as an arm sling or as a pad to control bleeding. It may also be used to support or immobilise an injury to a bone or joint or as improvised padding over a painful injury. A triangular bandage is a large triangle of cloth, also referred to as a cravat, used in first aid. This versatile bandage can be used as an arm sling, cover for head dressing, binding for splint or as a tourniquet. It is ideal for holding first aid dressings or cold packs in place.

A tubular bandage is a knit bandage with a tubular shape people can wear over an extremity to secure a dressing. This type of bandage provides support for the soft tissue around the wound and is more comfortable to wear than other types of bandaging.

How do I apply a bandage? https://www.nhs.uk/common-health-questions/accidents-first-aid-and-treatments/how-do-i-apply-a-bandage/