to easyfreeprintables.com

Free Printable Birthday Invitations

you can download, customize and print on your home or office printer.

Birthday Card Invitation templates are available in Word Format.  Cards can be printed 2 up on an 8 1/2 x 11 sheet, cut in half, then half folded for a final size of 4 1/4 x 5 1/2. Birthday Invitations will fit in a standard 5 1/2 bar envelope.
You can edit the inside wording, fonts and colors to suit your needs.