Matte card stock for easy fill in with any pen type.Ink from any type of pen or marker will not smear or run. Regular size.4x6inches， with plenty of space for guests to write their answers. made of high quality card stock. Durable and eco-friendly. 30 Party Invitations cards + 30 Envelopes. Impress your guests; Your guests and friends are going to love getting invited to your party with these exclusive one of a kind invitations!