Choosing a 16 x 20 frame comes down to one central fact: the labeled size refers to what fits inside, not the outer dimensions of the finished frame. The frame’s molding and profile width add several inches to the overall footprint, so a 16 x 20 frame on your wall measures larger than its label suggests.
Standard Size and Aspect Ratio Explained
The 16 x 20 measurement is one of the most common U.S. framing sizes, suited to poster-style artwork, photography lab prints, and gallery displays in residential or professional spaces. The aspect ratio works out to 4:5 in portrait orientation and 5:4 in landscape, which is a classic proportion for framed art.
When you order a frame labeled 16 x 20, the opening that holds your print matches those dimensions. The visible area, however, runs slightly smaller because the frame’s lip overlaps the artwork’s edge.
If you’re ready to browse tested options, our roundup of the best 16 x 20 frames available today compares real products across styles and price points.
Matted vs. No-Mat Mounting
Your choice of matting changes which frame size you need. A 16 x 20 frame works two ways: it holds 16 x 20 prints directly with no mat, or it holds smaller prints when paired with a mat whose opening is cut to fit the artwork.
A common mistake is ordering a 16 x 20 mat for 16 x 20 artwork. The mat opening must be smaller than the art itself so the mat overlaps the print edges and holds it in place.
For matted 16 x 20 artwork, many sources recommend stepping up to a 20 x 24 frame, which leaves room for a mat border around all four sides.
| Setup | Frame Size | Mat Opening |
|---|---|---|
| No mat, full-bleed print | 16 x 20 inches | None — art sits flush |
| 11 x 14 print with mat | 16 x 20 inches | 10.5 x 13.5 or 10.75 x 13.75 inches |
| 16 x 20 art with mat border | 20 x 24 inches | Cut smaller than 16 x 20 |
Measuring Fit and Common Pitfalls
Before buying, measure your artwork, not your old frame. The exact fit depends on the frame’s rabbet depth — the interior ledge that holds the glazing, mat, and backing — plus the profile width that determines outer dimensions.
Three mistakes trip up most buyers:
- Assuming the labeled size equals the outer frame footprint. It doesn’t; molding width adds inches.
- Ordering a mat cut to 16 x 20 for a 16 x 20 print. The opening must be smaller so the mat supports the art.
- Expecting full-image visibility without a mat.
Frame Destination’s guide to frame and mat dimensions for common print sizes walks through these calculations in detail. When in doubt, order your mat and frame together from the same source so the measurements align, and always confirm the dimensions in inches rather than assuming metric equivalents match.
FAQs
What size artwork fits a 16 x 20 frame?
A 16 x 20 frame fits artwork that measures 16 by 20 inches exactly when displayed without a mat. Smaller prints require a mat with an opening cut to their dimensions, such as 10.5 x 13.5 inches for an 11 x 14 print.
Is 16 x 20 the same as 40 x 50 cm?
No. A 16 x 20 inch print equals 40.64 x 50.8 cm, so a frame labeled 40 x 50 cm is slightly smaller. The difference is small but enough to cause fitting problems, so check the frame’s stated dimensions in inches before ordering.
Why does my 16 x 20 print not fit flush in the frame?
The frame’s lip overlaps the artwork edge by design, hiding roughly a quarter-inch on each side. If you need the full image displayed, request a frame with a wider rabbet or use a mat.
References & Sources
- Frame Destination. “Guide to Frame and Mat Dimensions for Common Print Sizes.” Explains standard U.S. frame sizes, mat openings, and fit recommendations.
- Framing Math. “16×20 Frame.” Details visible area estimates and measurement specifics for this frame size.
