The main "standard" Super Dollfie's have 13 points of articulation (no waist joint) and are supposed to look about 10 years old. (though they can be any age you want!)

wig size is 10 (10-11 is a little large, 9-10 is about right)
height: 22" (58 cm)
eye size is 22 mm (however you can use smaller sizes like 20 or 18 to get different looks with the iris)
waist is 8"arm - 6 (armpit) or 6 3/4" from shoulder to wrist joint
legs: 10 1/2" (to crotch)
hips 10 1/4"
chest 9 1/2"

Feet: feet are 2.5" long by 1 1/8" wide, but for socks probably need an extra 1/8" for the shoe. They are flat feet (not high-heeled) but you can buy a high-heeled foot to replace this if you want. (FO-03).
foot length 2 1/2"
foot width: 1 1/2"
SD can wear some 18" doll clothing including Madame Alexander's Cissy and American Girls,... however, the sizes of chest, etc, are not exactly the same, so fitting varies alot. Some American Girl shoes fit Dollfie well, and some are too big.

There have been three sets of standard releases.

The second release being the same dolls as the original release of Standard Super Dollfie, but coming with slips and having new, more delicate makeup. The older original release dolls are typically referred to as "old makeup". You may still be able to find them, but the dolls currently being sold at most volks are the "new makeup."

In addition to these two releases, the third release has all new SD body with new joints, new skin material (pure skin) and the new makeup. They come with white slips. The joints in the new SD body are more refined and attractive, but make range of motion a bit more limited. Some people prefer the new SD body, some prefer the old one. The new skin material (Pure Skin) is more matte (less shiny) than the old skin, and a slightly different color. So far Volks is gradually releasing all of it's Standard SDs in this version. So far there are only Nana and Nono released in this fashion. Also, optional parts are starting to be released in pure skin as well.

Kira, Sara, Megu and Nana are referred to as the four sisters since they all have the same face mold. The difference between these four dolls is their eye color, makeup color and wig color.