For my cousin's bridal shower (repost from BHB)

For her bridal shower we wanted to make a sign in board. We were thinking to put her e-pic in the middle with a white border so people can sign...

Has anyone done this as a DIY? I can imagine it's pretty simple and cheaper if you DIY...

I need to know how big the frame should be, how big the picture should be, where to go to get the materials....

Thanks all!!!

michales has a nice one thats pretty big and i think it was like $30
$15 if you use a 50% off coupon