well i think you can do a lot with a single bandage and improvisation, maybe some ducktape too.
i notice a lot of adds have, this kit meets requirements of eurostandards for motorcycles that are legally bound to carry first aid kits or something, basically meeeeens euro have to carry a first aid kit
really, i have a little coleman hiking first aid kit under my seat, ive stuffed a few extra things in, 2 bandages, thermal blanket, some extra band aids, some alcohol wipes a pill container with panadole, ibeprofan, voltarin and phenergan, it came with a few big band aids, tweezers gaze tape antiseptic wipes, etc anyway. looks like my overstuffed wallet anyway, but it fits under my seat.
i sometimes carry a big first aid kit in my panniers too, just a standard thing off the shelf but stuffed with some gloves, swiss army knife duck tape, and a few other htings that were floating around in my panniers. think i might have a PPK kit in it from work too, personal protection kit, gloves bandaids, bandages, saline solution or some anti septic solution now i think it is. washing blood off your self basically.