For a bow blind that is strictly a square design, I have seen no better window design than that used in the Boss Buck combo blind, has two vertical openers on each side of a horizontal window, link below.
If you are open a little to a octagonal design, the predator or buck palace design by Redneck is a great design for bows since each corner has a vertical window and the sides have a horizontal window. I had Riddler (blinds4real.com) on here make me a wooden blind based on the predator, and we hunted out of it for the first time this past weekend and it was perfect for my son to bow hunt out of but at the same time has flexibility for gun or crossbow. Our blind is on a 8 foot metal stand.
https://www.bossbuck.com/product/comfort-zone-4x6-combo-blinds-towers8.htmlhttps://redneckblinds.com/store/the-predator-360