How to Choose the Right Dress Size for Your Toddler (2T–6T Size Guide)

Shopping for a toddler's dress online means you can't do a quick try-on before you buy — so getting the size right the first time saves everyone a return trip. Here's how to make a confident choice.

Start with height and weight, not age. Sizes labeled 2T, 3T, 4T, 5T, and 6T are loose age guides, not guarantees. A tall three-year-old might fit better in a 4T, and a petite five-year-old might do better in a 4T or 5T. Every product page on Marktox includes a size chart with height and weight ranges for each size — measure your child against that chart rather than going by age alone.

Measure at home in under two minutes. Stand your child against a wall, mark the top of their head, and measure down to the floor. For weight, a home scale works fine. Write both numbers down before you shop — it makes comparing across styles much faster.

Account for the style of the dress. A fitted bodice with a full tulle skirt (common in our party and occasion dresses) sizes differently than a loose cotton everyday dress. If a product description mentions "true to size" or "runs small," size up when your child is at the upper end of a size range.

When she's between two sizes. For special occasion dresses that will be worn for a few hours, many parents size down slightly for a more tailored look. For everyday dresses meant for play and school, sizing up gives room to move and a few extra months of wear.

Check the return window before you buy. Even with careful measuring, sizing can be a guess. Marktox offers a 30-day return window specifically so a wrong size doesn't mean a wasted purchase — see our Refund and Returns Policy for details.

Questions about sizing a specific dress? Our Size Guide page has a full chart, and our support team is happy to help before you order.