Insert or picture size is 2" x 3.5" (50x88mm) or standard Business Card size. This Snap-in Photo Key chain is clear on both sides so you can insert 2 business cards "back-to-back. These are made with high quality acrylic. Acrylic is much more durable than poly styrene or plastic resulting in far fewer scratches. Acrylic also enhances the look of the insert both in clarity and brightness. (Sold in packs of 25 Key Chains)