Picture frames and boxes require joining two boards to create a right angle.

Heres the formula to determine the length each of your boards should be cut.

First, measure the size of the glass or photo you want to surround with a frame.

Then measure the width (facing you) of the frame material youve chosen.

Double that width and and add it to the length and width of the glass you want frame.

Those numbers will be the length and width of your frame material.

For example, lets say you want to frame an 8x10 photo with wood that is 1/2 wide.