If you haven’t posted a picture with this capture on your social media then are you even human? (might delete later!) Details: Designed by Jack Carter. Size: Square (148 x 148mm / 5.8 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 kraft envelope supplied. Made in the UK.