Men's apparel typically includes the following standard measurements: Neck: To get accurate sizing for dress shirts, measure the circumference about an inch up from where your shoulders and neck meet. Sleeve: Add together the length from the center of the base of your neck to the end of your shoulder and the length from the top of your shoulder to your wrist. Chest: Measure around the widest part of your chest to purchase the right shirt size. Waist: Measure around the narrowest part of your waist to get the sizing right for pants and shorts. Inseam: Note the length from the top of your inner thigh to your ankle. Although sizing can be consistent from brand to brand, it's always best to check the manufacturer's sizing chart before placing an order. When you order via Instacart, you can often find sizing information in the product description.