Ah the first born! We had it so good until the little sibling arrived. They do make some things more fun but mostly find them very annoying. We are glad Pusheen can agree with us on this one. Details: Size: A6 (105 x 148mm / 4.1 x 5.8 inches). - that fits as a standard sized letter in the UK mail. Produced from sustainable sources and/or recycled materials Blank inside for your own message. 100% recycled brown kraft envelope supplied. Made in the UK.