Professional quality: The Blank cards and envelopes are made of double adhesive paper, completely blank white 4*6 Blank Card paper, and A4 envelope, Blank cards and envelopes, have a total of 60 accessories, including 30 pcs envelopes and 30 pcs cards. A4 envelope size: 4.25 x 6.25 inches, folding card size: 4 x 6 inches. Our envelopes are perfectly fit for paper jams.Envelope seal: This is a very time-saving envelope, Each envelope has a separate tape, just remove the guard strip, press, and seal. Easy to seal peel and seal and close operations, this type of adhesive is ideal for commercial applications, wedding announcements, and mailings.Strong and thick: Our Cardstock with Envelopes is made of heavy-weight paper, 200g heavy cardboard, and 100g heavy envelope. When using, without the worry of perspective, protect your information. Cardstock with Envelopes are uncoated on the outside and inside, and you can use them to make with markers and watercolors.Print custom: These white Blank Card inside and out. These envelopes are suitable for printing. You can solve these problems with a laser or an inkjet printer. Blank cards and envelopes can be printed on digital and offset commercial printers. There is no need to worry about smudging or paper jamming, as these Blank cards and envelopes are compatible with most printer models.Multi-purpose: Cardstock with Envelopes can be made into office stationery, holiday cards, birthday cards, wedding cards, party cards, gift cards, thank you cards, Christmas cards, invitations, etc., Blank cards, and envelopes are suitable for all scenarios. Many children like to DIY their own favorite cards and envelopes. Children love to make and receive such emotional cards.Note: As our cards are manually measured, the error of 1-2mm will be generated during measurement. Product Description Strong and thick: Our Cardstock with Envelopes is made of heavy-weight paper, 200g heavy cardboard, and 100g heavy envelope. When using, without the worry of perspective, protect your information. Cardstock with Envelopes are uncoated on the outside and inside, and you can use them to make with markers and watercolors. Multi-purpose: Cardstock with Envelopes can be made into office stationery, holiday cards, birthday cards, wedding cards, party cards, gift cards, thank you cards, Christmas cards, invitations, etc., Blank cards, and envelopes are suitable for all scenarios. Many children like to DIY their own favorite cards and envelopes. Children love to make and receive such emotional cards.