Picture Frame Size Calculator
Frame Size Calculator
Calculate overall frame dimensions with mat
Glass/Backing Size
Calculate glass and backing board dimensions
Formula
Mat Outer = Art Size + (2 × Mat Border) | Overall Frame = Mat Outer + (2 × Frame Moulding) | Mat Opening = Art Size - 0.5"
Frequently Asked Questions
How wide should a mat border be?
Standard mat borders are 2-3 inches. Use wider mats (3-4 inches) for larger art. The bottom border is sometimes 0.5 inches wider than the top and sides (weighted bottom) for a more pleasing visual effect.
What is the standard mat opening overlap?
The mat opening is typically 0.25 inches smaller per side (0.5 inches total) than the art. This creates an overlap that holds the art in place and prevents it from falling through.
How do I choose frame moulding width?
Thin frames (0.5-1 inch) work for small prints and modern styles. Medium frames (1-2 inches) suit most artwork. Wide frames (2-3+ inches) are for large pieces or gallery-style presentation.
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