I measured my Garter Stitch bag before I put it in the washing machine.
The square measures a little bit less than 4 inches. Sorry for the glare.
16 inches across.
And almost 13 inches from the top point to the bottom.
It’s in the washing machine right now in a mesh bag and two pairs of jeans.
I will check it in 15 minutes.
I hope I’m happy with the results.