Next cut a piece of canvas down the the size of the frame with enough of a border to fold over the edges.
Where to make canvas frame.
Make sure you also get around the sides of your frame.
Now that you have the canvas s measurements and know what style of frame you want you can shop for a frame.
The standard frame sizes are 8 10 11 14 16 20 18 24 20 24 24 30 and 30 40 but some stores will have other sizes like 10 20.
To make a canvas begin by fitting 4 stretcher bars together to form a rectangular frame and tapping the sides with a hammer to make sure the corners are firmly joined.
Find one that is the same length width and depth of your canvas.
If your canvas depth is thicker adjust the width of the frame or the depth of the cradle.
If you did add another coat.
Also if you prefer the look of a floating frame make longer cuts to adjust for the floated space between the canvas and the frame.
My canvas is 3 4 inch thick and the 1 x 2s measure 3 4 inches thick which made the frame and canvas flush.
Take the canvas out in the sun to make sure it is a nice uniform application without bare spots you might have missed.
Wash your brush out put the lid back on your gesso and you are done.