The card is slightly smaller than my normal card - it's actually 4-bar (3 1/2 x 5), which still fits a standard envelope, BUT also just happens to be exactly the right width for the gingerbread houses.
I started by heat embossing the houses with white embossing powder on squash card stock, I cut them out and them ran them face down through my Xyron sticker maker, I then peeled of the backing and dropped it into a plate of diamond glitter - instant sugar topping! The gingerbread men and snowflake were cut using the Amuse Studio dies and then decorated with pearl stickers, baker's twine and a red felt heart cut using the tiny heart die - if you haven't tried using the Amuse Studio dies on their felt you really should, it makes me smile every time I do it - it cuts the felt like butter.
All the supplies for this card are available from Amuse Studio
stamps: jolly gingerbread
paper: squash, twas the night before Christmas, sugar shimmer
misc: dies - gingerbreadman, snowflake, heart, pearls - onyx, cranberry, sugar, cherry baker's twine, cherry felt, copic liner