People come in all different body shapes, and that’s a beautiful thing. But because of this, determining your right size by your height and weight can be a little tricky. For example, if you happen to be top heavy but petite everywhere else, you might have a hard time finding clothes that hug every little curve just right. Fit also varies between brands. However, you can at least get a general idea of clothing sizes based on height and weight.

Sizes for Children and Infants

Clothing sizes for infants are usually given by age: 0 to 3 months, 3 to 6 months, 6 to 9 months, and 9 to 12 months. Kids’ clothing tags also list the length and weight ranges for those sizes. Match your infant’s length and weight to the chart on the tag to determine the proper size.

For toddlers, sizes range from 2T all the way up to 5T. The number indicates the age of the toddlers that should fit in that size. However, some toddlers are bigger or smaller than others, so match their height and weight to what’s listed on the tag as well.

Children’s sizes are usually broken up into two sections: sizes 4 to 6 for younger kids, and sizes 7 to 16 for older kids. Typically, a size 4 is for children who are 35 to 39 pounds and approximately 39 inches tall. For each subsequent size, add 3 to 4 pounds and about 3 inches.

Clothing Sizes for Men and Women

To figure out your own size, know your height, weight, and measurements your chest, waist, and hips. Wrap measuring tape, also known as a tailor’s tape, loosely, but without any slack, around the widest part of your chest and hips and the narrowest part of your waist.

Use a sizing chart to determine your size. The size may vary by up to 1 inch of height and 10 pounds of weight, give or take. A woman who is approximately 5′ tall and 100 pounds would usually wear a size extra small, while a woman who is 5’9″ and 160 pounds or more runs closer to size large or extra large.

Decide if you should be shopping for petite sizes or big-and-tall sizes. For women, petite sizes might apply if you’re 5 ‘4″ or under; regular sizes may be too long, too baggy at the shoulders, or too high at the waist. For men, tall sizes usually begin for those who are 6’2″ or taller; big sizes are for those with a 46- to 48-inch waist and 50- to 52-inch chest.