Sforno on Exodus 28:32/ספורנו על שמות כ״ח:ל״ב

1לא יקרע, the robe should not have a regular collar and neckline running down the front of the garment open, but it should be round as a ring. The expression יקרע, is applied to vertical openings in a garment or building. The expression occurs in a similar sense in Jeremiah 22,14 וקרע לו חלוני, “provided with narrow windows cut out, etc.”