With the Americanflat Black Collage 4 x 6 Picture Frame with 4 Openings, you're well on your way to a professional-looking, personalized photo display that tells your story. Great for family photos or the best shots from an event or vacation, this black picture frame coordinates with contemporary and transitional styles. The acid-free white mat has openings that measure 3.5 x 5.5 in. To keep photos from slipping out of position, we recommend using tape to secure them to the back of the mat.