Luts has discontinued their Junior Delf size. He is a really neat size, reportedly 56cm (I think he's a bit taller in reality), but noticeably shorter than the average SD boy (which is usually at least 60cm tall) -- unless that boy is a Volks SD10, as I think they are short too. I believe the body is roughly identical to one of the Senior Delf bodies, except with shorter legs.

Keep in mind his head size is a little on the larger end for SDs, about 9-10"!  Luts does still sell the Rigel head on a Super Senior Delf body, which is 70cm tall - so his head will be pretty big next to a small 8-9" headed SD doll.

I am the second owner and bought from the first owner on Den of Angels, a reputable hobby board that does not support or allow recast dolls.
He was made in 2010 and is their normal skin resin.  He will come nude, with a pair of eyes installed.