Building costumes takes a variety of skills, and I’m continually impressed by cosplayers who are able to replicate outfits seen in films. Instructables user Ridd1e used her sewing and wig styling knowledge to become Snow White, and it’s so spot on that she looks like she could be a cast member at the Disney parks. She started with a Disney pattern for the corset and then modified it to get it just right, and she stitched every piece from the collar to the skirt. Here are some details on Snow White’s puffy sleeves:
The sleeves are based on a slash sleeve. The reference material had red fabric along the outside edge but I wanted it as two separate elements. So I made the sleeve pattern, cut out the holes that I wanted the red to peek through then I made a copy in the red fabric (with no holes). Making it slightly bigger than the blue sleeve so a bit would peek through; I then stitch the red to some muslin to make it thicker.
Red under sleeve: I just did two running stitches and gathered it till it was the same length as the blue sleeve. This also causes the sleeve to be puffier.
Blue sleeve: just finished all the edges.
Sew the two together, cut a strip of the dark blue suede and finished off the arm hold. Once that was done attach it to the corset.
Full tutorial at the below link.