When they are 6 month they have to be 11 to 16 inches and weigh 180 to 225 grams if it’s between these it means it’s healthy! The length is good but you got to give it a bit more food or food that have more fat
She looks good-- dragons grow at different rates- as long as she has a healthy diet good basking surface temps and a good uvb properly placed and distanced NO COILS-- she should do fine