16x white cardstock photo mats included in each pack, 2x landscape and 2x portrait of each size. Sizes are: 

2 x 3 inches
3 x 4 inches
6 x 4 inches
5 x 7 inches

These mats are designed to help you plan your scrapbook layouts even when your photos aren't available. Simply place a mat in the space where your photo will go so you can arrange your embellishments and designs with ease. Each mat matches standard photo sizes, making it easy to swap in your actual photos later.