All The Cards Are Printed On 10% Recycled White C1S (Coated One Side) Gloss Tango 260gsm/96lb Paper. The Inside Of The Card IS NOT Coated Which Makes For Easy Writing With Either A Ballpoint Or Fountain Pen. The Cards Are A6 Which Means Roughly 4 X 6 In Size (Exact Measurements Are 6 1/2 X 4 3/4). The Envelopes Are 32lb Natural Linen, Smudge Proof With A Peel & Stick Square Back Flap (No Licking To Close The Envelope).