Planning a March Madness get-together just got easier with these B-ball themed party invitations. Their ball shape gets the theme across right from the start, and all the text is editable on both sides, so you can name the party anything you like, and add all your details on the back. Colors cannot be changed. Personalize these basketball-themed party invitations in minutes at Pear Tree. Square envelopes are included and do require additional postage to mail. You also have the option to choose rectangular envelopes at checkout, which do not require extra postage and have a pocket inside to hold square-shaped cards without shifting.