First time ordering the baby girls swinsuit was WAY to small! Contacted Customer service and they took care of it completely! Gave me a free friend and then I just re-ordered the new size and it came super quickly! The new size is perfect. At first I ordered the 6 to 9 months it was way too small for my five-month-old daughter. She weighs 13 pounds! So I bought the 9 to 12 months and it fits perfectly! So happy with this product! The adult same swimsuit runs true to size! I am 5 foot 190 pounds and I ordered the extra large and it fit perfectly!