The image below provides a flow chart to determine the new postal rates. Most bubble mailers that we ship chips in will go at the FLAT rate determined by weight. Here is the flat rate pricing chart.

USPS Flat Rates
Ounces Cost
1 $0.80
2 $0.97
3 $1.14
4 $1.31
5 $1.48
6 $1.65
7 $1.82
8 $1.99
9 $2.16
10 $2.33
11 $2.50
12 $2.67
13 $2.84

Hope this helps