Alphabet and Numbers 0 - 9 for classroom decoration, creating spaces and so on. Also includes extras for "literacy, "numeracy", "science" and SOLE (Self Organised Learning Environment) with a couple of spare exclamation marks. Will be doing another soon. If you want to be able to edit there is a Microsoft Publisher file available instead and you can play 'with it to your hearts content.
The circles print out at 11.7cm - was the best size to fit 3 to a page on A4 and I have a smallish classroom. You could easily upsize the print to A3 and give yourself quite large letters.
Easy to print up on a colour laser printer or at a print store, cut out so you just get the black circles, laminate and cut the laminating. Little bit laborious but looks great in the end. I wanted my room to have a little more style about it - guess we'll see?