White Treat Bags (50 Pack) Plastic. 8 1/2" x 12" Your party favors need a place to live. The perfect addition to your party supplies, these white bags work great for weddings, baby showers, black and white parties, graduation parties, office celebrations and more. You can even get creative and fill these with rocks or marbles and make your own DIY table centerpieces. Plastic. (50 pcs. per unit) 8 1/2" x 12"