If you know your PO well then ask them for a letter gauge as then you'll have the thickness guide you need

for items that can go as letter rate.

I did send a few thicker case items earlier in my selling but as noted you can only fit one in the smaller envelope

and two in the bigger one.

I post all my items via the post office and they know I prefer the stickers instead of the stamps as it contains the

time and date that the item was sent.(I always get a receipt as well so I have that info).

Posting via the PO also makes certain the correct postage is charged,(I have a set of scales that items are

weighed on).

Thanks go-tazz, I will keep that in mind.

I prefer prepaid envelopes and buy them in 100 lots to save 10%, works out at $2.20ea.

These are the best for series as they usually weigh over 125gm and the prepaid envelopes will allow 500gm as long as it goes through the slot.

As said above, I use the larger prepaid envelope to post 2 dvd's or 2 series side by side as that way they still fit through the slot