The Bleed area extends 1/8th in. Beyond every edge of the card. Make sure that your background extends to the extent of the bleed area to avoid your cards having slivers of white when trimmed.
3.50" x 2.0" This is the finished size your cards.
3.34" x 1.84" To avoid trimming anything important, make sure to keep logos, text or anything else you don't want trimmed away from the edge of the card, or else it may be trimmed.