The skirts. One gal, to the right, seems to have a pleated skirt. I can see the folds and the pressed pleats fairly well. How deep are the pleats? I can tell based on the pressed edges they are not very deep at all. . . Almost shallow. How many pleats are there? I have no idea. The other gal, on the left, I cannot tell much about her skirt. There does appear to be some sort of seam or may be a pleat edge but I cannot tell for certain. As for the length. . .Because they are not standing we cannot know for certain how long these skirts are but if I had to guess about knee length or past. That was the 40s standard. Like the blouses mentioned above, finding a skirt that would be appropriate to wear for an event should not be too difficult. Like the blouses, a period skirt is not hard to make, patterns are abundant, and if buying one . . they are plentiful. Some tips for a period skirt - past the knee in length (no further than mid calf), choose a plain solid color (easy to wear with other things) in a light weight wool or even a good cotton. Why wool? The lion's share of original skirts I have come across have been a wool or a fabric very similar to it. Wool also has a very attractive drape as well which looks really good on the human figure.
Hair. Let's talk hair dos shall we? I going to start with the girl on the left because we have a fabulous view of her hair from the back and the side. I can see that the hair on her front looks like it was swept and pinned into a pomp which was secured at the sides by combs (maybe barrettes). The back of the hair has this amazing texture to it and I am guessing that may be her natural hair texture or else it was crimped. To get it for yourself synthetically I am thinking you will need a lot of product and some very good tools. If this is not her natural hair, she may have used a crimping tool which was used in the previous decades to get desired waves and bumps. You can still find period crimping tools here and there or else use the more modern equivalents.
For the girl on the right, her hair is much more simple. Her hair looks like it has larger curls or waves. Is side parted, secured at the sides and then left down. Much easier to execute. That hair could be her natural hair or it could be curled. If you do no have naturally curly hair and want to pull of this look then you will need to find a way to curl your hair.