We know they might not be your most favourite person but it’s still nice to wish them a happy birthday, so send this subtle birthday wish. Details: Designed by Tom Camp. 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.