NATURAL BEAUTY BASIC Square Neck Knit Navy, Size M Although it's size M, it fits quite snugly. The sleeves are about 8-9分 (likely referring to the length, perhaps 8/10 or 9/10 length). The fabric is thin, making it suitable for wear from spring to early summer. I've worn it for about 2 years, and as the photo shows, there's one snag, but overall, there's no pilling, and it's still wearable. Color...Navy Season...Spring/Summer