Spooktacular Creations Ninja Dragon Costume Outfit Set for Kids Halloween Dress Up Party, Carnival Costume

I have a 7 year old who is 45 inch tall and 39 pounds. Worried that the small will be too short. Can you tell me how it runs lengthy wise?

What size should I order for a child that weighs 79 lbs?

What size should I get for a 5 year old / 35 pounds?

The sword is broken. How do we get a replacement without sending everything back? We already exchanged once for a bigger size.