Since we'll all be sewing from our own patterns, everyone's material requirements are going to be a bit different but here are some good rule of thumb lenghts:
Blouse: 1.5 to 2 yds
Shorts: 2 yds
Dirndl Skirt: 2.5-3 yds
Cotton is a great choice for material. Voile, poplin, twill and even quilting weight cottons are great options for your playsuit. Enjoy all your favorite fun summer fabrics like gingham, seersucker, and dotted swiss.
I've even seen adds for playsuits made out of denim!
Linen is another fun option. It's such a great durable fabric that will hold up to all of your summer adventures.
The 1940s love of rayon included playsuits too! Rayon is perfect for draped skirts in particular.
Don't be afraid to mix and match your fabrics too! Keep your blouse light weight but feel free to use a thicker fabric for the skirt and shorts.
Another important thing to consider is lining if you are planning on using lightweight and light colored fabrics. Personally, I prefer a nice lined or underlined piece than having to worry about slips and camisoles during the summer.
Don't forget to consider embellishments like ric rac and other trims, buttons and zippers.
For our dirndl skirt sew along, you'll need around 3 yds of fabric and 6-10 buttons depending on how long your skirt is and how closely together you space the buttons.