There are 4 size of banner, these are the approx sizes:
Small, suitable for a small room in a house, or across a door: 3ft x 1ft (900 x 300mm) approx
Poster sizes are:
A3 297 x 420mm
For indoor banners we recommend using poster pads, blutac or pins or you can select the eyelets for tying with string. Indoor banners are a lightweight polypropylene and are not heavy. Eyelets are not recommended for 3ft banners.
For outdoor banners use eyelets through which you can put string or cable ties to attach to a fence or a wall etc. Eyelets are 24mm across with a hole diameter of 11mm, they are brass in colour.