1.DIMENSIONS: each birthday invitation card measures 4 x 6 inches (W x L) with a white envelope that fits the card. 2.QUANTITY: package contains 20 birthday invitation cards and 20 white envelopes. 3.MATERIAL: birthday invitation cards are made of high quality sturdy coated paper. You can easily write on paper without worrying about ink bleeding. 4.DESIGNS: your guests will be delighted to receive these beautifully designed and vibrantly colored invitations to your birthday party! Perfect for inviting family and friends to a birthday party with a specially designed card. 1.DIMENSIONS: each birthday invitation card measures 4 x 6 inches (W x L) with a white envelope that fits the card. 2.QUANTITY: package contains 20 birthday invitation cards and 20 white envelopes. 3.MATERIAL: birthday invitation cards are made of high quality sturdy coated paper. You can easily write on paper without worrying about ink bleeding. 4.DESIGNS: your guests will be delighted to receive these beautifully designed and vibrantly colored invitations to your birthday party! Perfect for inviting family and friends to a birthday party with a specially designed card.