What are your preferences.

I find myself using two sizes. 4x8 and 16x10.5

Curretly I've been using

http://www.business-supply.com

SEL01000
Jiffy-Lite Mailer, Self Seal, 4 X 8 Inch
500 per Carton
$63.28 (0.12656 each)

SEL01115
Jiffy-Lite Mailer, Self Seal, 10 1/2 X 16 Inch
10-1/2" x 16"; 55 lb.; Gold Kraft
125 per Carton
$47.93 (0.38344 each)

Are there better prices on the internet? I've looked several places and with this one having Free Overnight Business shipping on orders over $25 this one is the cheapest "I've found" so far.

So far these envelopes have done extremently well in shipping but I am wondering if there might be stronger/better envelopes at similar pricing that I've missed seeing.

There are many different manufacturers and types of same/similar envelopes out there which I don't know the differences between each. Any one with some knowledge, please share that knowledge here.

I am about due for a new order of the larger envelopes.