Stand-Up Pouch. How to choose the right size?

The Stand-up pouches have seen tremendous growth over the years. The pouches provide access to sturdy and premium packaging to small and big businesses with low investment.
The two-three layer pouches are common in the market. The inner layer is food graded which is designed to keep food contents safe and fresh. The middle layer carries all the advertising.
LLDPE - Poly - is the inside layer that provides a moisture barrier and exhibits a low melting point. This layer melts together to form the seal.
The zip is then heat bonded onto the bags.

The standard genuine problem with the stand-up pouches is with the size and volume of the paper pouch. All businesses interested in the paper pouches want to know exactly how much item can be packed inside the pouch.
All manufacturers of the paper pouch make these pouches based on the dimension not on weight to be packed inside. The manufacturers do make these paper pouches in multiple sizes, but still, the customer doesn't get to know the perfect fit pouch for its product.
There are many suppliers and wholesalers in the market selling these paper pouches based on the weight, but it won't work as the pouch used to pack 100 gram of pulses will not be good enough to pack the same amount of tea powder. It's best to avoid this approach and do your research.

Being part of the packaging industry, I get these questions every other day. After addressing the issue in brief, it's time for a small kitchen experiment.
I took four everyday food items with different volume and density and tried packing them inside different sized paper pouches. I weigh and recorded how much of these food items can be packed inside each of the available pouches.
Now if you want to pack coffee powder inside the pouch, the readings associated with the Tea powder make sense. I'll be much easier for you to decide the perfect fit pouch now. Isn't it?
If the 4-inch X 7-inch pouch works for the Kidney beans, then it should be good enough to pack the same volume of almonds though the weight of the almonds might be slightly more.

Another solution is to calculate the volume of the pouch and use the volume measurement of the pouch. The volume-based solution is proposed on many of the websites online.

It's because, in practice, the pouch doesn't maintain the cylindrical structure once the product is packed inside.

After closing the pouch form the pyramid shape on top and circular shape at the bottom. Imagine the pyramid kept on top of the circular tube. It changes the formula to compute the volume of the paper pouch.