I had intended to make a dress for my 5 year old daughter Anna, but there wasn't enough fabric width wise to do that (but she's that girly in the shirt's before pic not the actual recipient of the dress). It ended up being for my 3 1/y year old daughter, Emily. She generally wears size 4T and that's about what I think this dress size is. I enlarged the suggested pattern measurements by adding 1 1/2 inches all around. I think next time I need to add more space to the underarm area though because that spot is snug on her.
I also added a little ruffle to the bottom of the dress with some additional scraps I had after making the wasteband. If I had some of those cool fabric button cover thingys I would have made buttons with the dark blue scraps, too. Next time maybe.
I love the whole recycle/upcycle idea of turning unused shirts into darling dresses. I definitely see more of these in my girls' futures. Happy sewing! - Leslie