Personalised SpongeBob Birthday Party Invitations All our invitations are printed to A6 Size (148mm x 105mm) and are professionally printed on 250 gsm card. We have an Option for you to purchase these with white envelopes. Beautiful high quality A6 prints with our very own design.  250gsm card with a smooth  finish that's perfect for writing on. If you would like a sample card please feel free to contact us and tell us which design you would like. Dispatch Time Our dispatch time is 1-2 working days 1st class royal mail Thanks for visiting this page. If you have any questions please don't hesitate  to contact us via eBay messages.