Picture Frames, Mats and Framing Supplies

Frame size, mat opening and print size are three numbers

Frames are sold by the print size they hold, such as 4 by 6 or 8 by 10 inches. A mat adds a border and covers the print edges, so the visible opening is smaller than the print. A 16 by 20 mat for an 11 by 14 print means the frame must be 16 by 20, not 11 by 14. Check the molding depth, since deep profiles hold thicker mounts, and check whether the frame is sold with glass or acrylic. Document frames follow letter or A4 sizes.

Glass or acrylic, and keeping art from yellowing

Glass is rigid and resists scratching, but it is heavy and shatters. Acrylic is lighter and safer for large frames and children's rooms, though it scratches and can build static. Archival framing uses acid-free mats, backing board and mounting tape, because ordinary paper board releases acids that yellow photographs and prints over the years. UV-filtering glazing slows fading in bright rooms. Wooden frames add warmth, while metal and plastic profiles suit modern spaces and wet rooms.

Questions about Picture Frames, Mats and Framing Supplies

How do I size a mat for my print?

Choose a mat whose outer size matches the frame and whose opening is slightly smaller than the print, so it overlaps each edge by a quarter inch or so. Kits list both the print size and the frame size.

Do I need acid-free materials?

For photos, prints and documents you want to keep, yes. Acid-free mats and boards prevent yellowing and staining. For temporary displays or mass-produced posters you do not mind replacing, standard materials are fine.

Can I hang a frame without a hook?

Many frames include sawtooth hangers or stand backs. Heavier frames need wall fixings rated for their weight, while mounting tape or strips suit light, small frames on smooth walls. Check the weight before you decide.