I reckon they are a small kid's hands.
Wow, the girl figures are articulated. Wasn't excpecting that!
In fact, I'd go as far as saying they are using a Microman base body style to them. Hmm, interesting. Star Saber doesn't look as bad as I thought he would in robot mode. But still... 8000 yen...
3 variants, as a Fortress Maximus was also pictured in artwork when they were first mentioned.