These photo add-ons are available through Bay Photo only. If your photographer has chosen this lab for their prints, you'll find an option during checkout to add frames, mats, and more to your photos.
To select these options, buy your chosen print as usual and proceed to checkout. Next to your preview image in the cart, you'll see a button for Finishing Options.
Click that button to bring up a menu that will allow you to choose any frame and mat combo you like, or select a mounting option. You'll see the price for your print adjust based on your selections.
Once you've made your selections, click Add to Print and you'll be taken back to your cart to finish checking out.