Party Supplies We just finished Jurassic Party themed invitations. Four postcard size designs are available separately or in packs of 10 and 30. Individual cards are sold for $1.00 each. Sets of 10 are sold for $9.99 and sets of 30 for $19.99. If you would like to order these cards online please contact us with the quantity and style you would like. They are also available for purchased at Prehistoric Pets, our Fountain Valley retail location. All invitations are standard postcard size (6 in X 4.25 in) and share the same postcard style back that can be addressed and sent in general mail. Join Jurassic Parties Community: