Designs required for posters and stickers

We're UK's fastest growing food delivery start-up. We need our brand's creatives for posters and stickers that'll be installed on our restaurant partners' windows.
We initially require 2-3 designs, ideally of A2/A3 size, which would be generic and according to our brand's design guidelines. There will be some smaller stickers too, that will be installed on doors/handles, and would be simple "Push"/"Pull" or "Open/Close" with our brand's branding.
Design guidelines will be shared later.