Cherishdoll Faith dolls are 21 cm (8.3″) tall. They wear 5.5″ wigs and take 10 mm eyes.
Re-ment and other same sized miniatures (1:12) are a perfect match for these dolls! Playscale (1:6) furniture and miniatures are great if you want to give them a small-kid-appearance.
The following recommendations are for the “new-boy” body, not the more slender “new slim-boy” body released fall 2010 (comparison pic).
As for shoes, the “micro” sized canvas sneakers found on eBay for Blythe/Pullip are perfect, and they can also wear the slightly larger “mini” size just fine (especially combined with the flared Bratz Boyz pants).
Besides the wigs you can get from Cherishdoll, I can recommend having fur wigs custom made from Sunny’s Wonderful World on eBay, or mohair wigs from tinybear/Sleeping Elf, like the black wig my doll is wearing in some pics. Liv dolls’ wigs are an option though not quite perfect, the plastic wig cap is covering half of the ears and is visible in the neck area.