Hi what size should I design my posters in to store on my canva to then send to print? Thank you

Hi I'm just starting out. Is mid journey the best platform to generate art? And if you already use it is the basic package enough? I already use canva Pro so I'm hoping to use both. 😊

Yep, cant believe it...... Had my etsy store for a number of years now trying various things and following different strategies and people and getting I think, 2 sales. HOWEVER after following Toms FREE info and giving this a go, my first sale has come through on the eve of 30/08/26 after me joining Print shrimp early July. So just over a month and 100 posters uploaded, I get my first sale. Awesome and such a positive direction. Keep building and keep going.