My daughter is 5 and sheโs average height. I ordered the 5/6. The back of the dress has a zipper. It also has tie straps. The dress is lined on the inside with white and it stops right above the main dress. It comes with a decorative bead necklace. The necklace has 2 clasp one for each side. It can also be worn without the necklace and the latch connectors arenโt that visible from the dress. Itโs elegant. Itโs classy and perfect for formal events. The sides of the armpit fits perfect. Not long or loose. Overall we love it. Love the pattern.