What size is a large at Old Navy? Size Chest Waist M 36-37 28-29 L 38½ - 40½ 30½ - 32½ XL 42½ - 45 34½-37 XXL 47½ 39½ What sizes does Old Navy carry? We launched sizes 0-28 in stores and sizes 0-30 online in August 2021, and since then, we've welcomed millions of new customers to Old Navy and learned a lot about where and how they...