Sprite Stitch Board!

Hi everyone,
I was wondering if you could help me please? Id like to do a cross stitch coaster for my fiance's birthday and Id like it to be Mario, just something simple. i have the plastic coaster to put it in i just need a design to stitch!

Forgot to say its a square coaster

What dimensions are you looking for?

The maximum area for the design is 7cm by 7cm would prefer it to be a little less if possible though please and thank you for replying