1000 New. Resealable Plastic Bags. This is a new set of 1000 resealable plastic bags. These high quality reclosable plastic bags allow you to have the bags you use most on hand. The reclosable seals open all the way to the edges of the bags giving you full use of the interior. Each has a 2 mil thickness and measures approximately 3" x 5" (76 x 101 mm).