Toddler sizes typically refer to clothing sizes designed for children aged 1 to 4 years. These sizes are often labeled as 2T, 3T, and 4T, where the "T" stands for "toddler." The numbers indicate the child's age, with "2T" suitable for a 2-year-old, "3T" for a 3-year-old, and so on. In addition to age, toddler sizes consider the child's height and weight. For example, a 2T size usually fits children who are about 32 to 36 inches tall and weigh between 25 to 30 pounds. It's important to check specific brand sizing charts, as measurements can vary.