Hi Pam,

If your envelope qualifies as a Large Envelope ie it is under 3/4" thick and the contents evenly distributed and taped in place so they do not shift and your PO is not one that says that All bubble envelopes must go at parcel rate, then up to and including
1 OZ is 88 cents
2 OZ is 1.05
3 OZ is 1.22
and for each additional ounce up to 13 oz is 17 cents per ounce.

If your bubblie does not qualify for Large Envelope rate or if your PO just charges Parcel Rate for all bubblies then up to and including
1 OZ is 1.22
2 OZ is 1.39
3 oz is 1.56 and 17 cents per ounce for each additional ounce up to 13 OZ.

Here is a link that might be useful: New May 2009 First Class rates