Wardrobing on my previous films has often amounted to browsing through each actor's closet and, if they're lucky, making a quick stop by the Goodwill. For my new project, though, there are about 20 characters, not to mention 150 extras, all of whom we have to dress for a mid-19th century masquerade ball.
In all seriousness, we're going to have to do a little costuming for the new project I'm working on. It's nothing elaborate -- just a uniform for a baseball player -- but a even single costume means taking measurements. I found the following forms online, and they've been useful for me. Maybe they'll be useful for you.
The first form listed above comes from The Costumer, a costume rental house.
The second form comes from MIT's OpenCourseWare website, specifically their Fall 2004 course entitled Costume Design for the Theater. I browsed the site for a few minutes. It looks like it could be a great, and free, resource for budding costumers.
Also, while I'm on the subject, MovieMaker Magazine had a pretty good article about low budget costuming last summer.
Finally, if you're serious about looking at the art of the costume designer, it's tough to go wrong with Screencraft: Costume Design. It is a good book and, as an added bonus, there's a large photo of Michelle Pfeiffer as Catwoman on the cover. Meow!