Onesie Size Guide

Onesies come in a variety of sizes for men, women, juniors, children, and babies. Choosing the right size can be difficult, especially if you’ve never purchased a onesie before. Our comprehensive size guide will help you determine how to find the best fit.

How do I choose the right size for my onesie?

Choosing a size for a onesie is a little different than choosing a size for separates. Some people prefer their onesies to be larger than traditional pajamas, as onesies that are too tight can decrease mobility because they are all one piece. However, onesies that have stretchable fabrics such as spandex can be smaller and more form-fitting.

Onesies with feet will also add another factor to your sizing decisions. You’ll want to make sure that the feet on the onesie aren’t too big or small for your own feet. You’ll also have to measure the length of the onesie more accurately if it is footed. With footless onesies, you can simple roll up the legs if they’re too long, and if they’re too short, they just won’t cover your ankles. But with footed onesies, purchasing a length that is too short or long can make them unwearable.

You’ll also want to consider the fabric. If the onesie you’re choosing is made of a fabric that can shrink, such as cotton, and it fits you well, you won’t be able to dry it in a hot dryer or wash it in hot water. If you’re worried about shrinking, purchase a size up.

Onesie Size Charts

When looking at our sizing charts, the measurements are based on your measurements, not those of the onesie. If you fall between sizes, or if your measurements indicate two different sizes, order a size up. For example, if your bust measurements fall under a large but your hips fall under a medium, order a large.

For children, you may want to order a size up so that they can wear their onesie as they grow.

To measure your chest, measure all the way around the fullest part of your chest. To measure the back of your neck to your crotch, sit down and measure from where the back of your neck starts all the way to the chair.

For the inside leg measurement, measure your inner leg from your crotch all the way down to your feet. This is an important measurement to determine the length of your onesie, especially if you are ordering a footed onesie.

If you are ordering a footed onesie, foot measurements for onesies go by your shoe size.

Babies Size Chart

Measure the baby’s height from the top of their head to the bottom of their ankle.

 

Juniors Size Chart

Chest is measured from one side to the other at the fullest part of the chest. Back of the neck to crotch can be measured sitting down on a chair, from the back of the neck down to the chair. Inside leg, or inseam, is measured from the crotch to the bottom of the ankle.

 

Women’s Size Chart

Chest is measured from one side to the other at the fullest part of the chest. Back of the neck to crotch can be measured sitting down on a chair, from the back of the neck down to the chair. Inside leg, or inseam, is measured from the crotch to the bottom of the ankle.

 

 

Men’s Size Chart

Chest is measured from one side to the other at the fullest part of the chest. Back of the neck to crotch can be measured sitting down on a chair, from the back of the neck down to the chair. Inside leg, or inseam, is measured from the crotch to the bottom of the ankle.