height: how far from the bottom of the stem the center of the bars are, so 32 rise means that the center point of the bars are 32 millimeters above where the bottom of the stem is
reach: how far the bars are from the steerer tube, 48-53 is normal
length: see reach
the freeze is one of the stems that are the tallest, so if you want a taller front end start looking at bigger bars or a new fork with a taller steerer tube

refs: hookjrclc, hardbmxtim, hatchmoses for sale and trade, kymike for sale and trade, blizzbikes for trade, and some other dude i cant remember his username, vrsapat956, colonydirt94, mario.villegas90, wolfen
Camera Setup: Panasonic HMC150, Panasonic GH2, Canon FTBn, Yashica Lynx 5000e, Canon 28mm f/2.8, Canon 50mm f1.4, Rokinon 7.5mm f/3.5