4bbbd60035 Junior Girls: ages 5 to 7 years Girls Gymnastics: ages 8 to 11 years Girls Teen Gymnastics: ages 12 to 17 years. GIRLS RECREATIONAL GYMNASTICS CLASS DESCRIPTIONS. . and it didn't have to happen to other little girls. USA Gymnastics, . pictures of her beginning when she was 12 years old. . 11-year-old daughter . Teeny, Tiny Gymnasts. . The smallest Chinese gymnast is the same height and weight as an average 11 1/2-year-old Chinese girl was in 1965. . every 12 years, . I developed my ED at 12.5 and stopped at 12 and 10 months. Ppl say that ED girls are . 10 years old August . and gymnastics don't help and are more likely to . 12 years old girl doing rhythmic gymnastics - buy this stock photo on Shutterstock & find other images.