How do I choose a bag size?

If unsure of the size of bag you need, feel free to contact us for help.

It is fairly simple to calculate the size of the bag needed, which starts with the measurements of what is going into the bag.

Here's some basics: 

  • The circumference of a bag without side gussets is  twice the width. A 12" wide bag has a 24" circumference. (12+12)
  • Circumference of a bag WITH side gussets is twice the width, plus twice the gusset. A 12" wide bag with 7" gussets has a 38" circumference. (12+12+7+7)
  • Bags can have gussets either in the side or bottom, but not both.
  • To get an idea of size, most grocery store t-shirt bags are about 12" wide, 22" high, with a 7" side gusset (called a 12x7x22). 

The circumference of the bag should be larger than the circumference of the items going in the bag.  This is generally only a concern when there is a specific size object needing to be bagged. 

If you have a box that is 9" long and 6" wide, its circumference would be 30". (9+9+6+6=30). Half of 30 is 15, so a 15" wide bag would fit perfectly, but it's best to get a slightly larger bag, around 16", to make bagging easier. You could also use a side gusseted bag, like a 10x6x22, which would have a 32" circumference. 

Bottom gussets in bags will help the bag sit flat when expanded, but do not increase the circumference of the bag. for that same 9x6 box, a 16" wide bag with a bottom gusset of 6" will hold the boxes nicely. 

American Plastic Mfg., Inc. |  526 South Monroe St, Seattle, WA 98108

(888) 763-1055  |  (206) 763-1055  |  FAX (206) 763-3946

Copyright © 2016 • American Plastic Mfg., Inc.

You can stop spam mail with MX Guarddog

 Back to Top

Back to Top