Christmas Card Size For Standard Postage. 3m length and depth combined. Mailpieces larger than any of those dimensions and you'll have to pay flats (large envelope) postage prices.
Square card blanks are measured in centimetres or inches, while dl card blanks have one set size: To send a large letter, a4 size, it costs £1.15 for a 1st class stamp or 88p to send it 2nd class. Up to 30 g up to 5 sheets of paper* $2.71.
These require two first class postage stamps for the first ounce and additional postage for each ounce beyond one.
It’s perfect to fit one or two photos and a note to wish your friends and family happy holidays. Many people refer to the royal mail 'letter' format as standard post. Since it is uniformly thick and slightly flexible, but too large to be sent as a letter, it is considered a large envelope. 130 x 240 x 5mm.