Simple Joys by Carter'sGirls' Short-Sleeve and Sleeveless Dress Sets, Pack of 2

My daugther is 7 months and 2 weeks what size would you suggest for her?

Amazon package fell out of truck. Can someone come pick it up?

Do they all come with diaper covers? Or just the dresses that have them in the picture?

What is the weight range in 0-3 months & 3-6 months sizes?