bulk proof of posting form

KxMx

You can ask for a cash receipt, it will list each item and a price in the order you sent but no address details

As macfly suggested you could hand over heaviest first, get the bulk form stamped and a cash receipt.

macfly

The "other bits" is the thing that tells you how thick the parcel is. Get a ruler.
Try not to get too snotty, I'm one of the people doing your thinking for you

soolin

This is the sort I've got- but I didn't pay this much for it- so watch for other sellers listing who are cheaper:

http://www.ebay.co.uk/itm/HELIX-ROYAL-MAIL-STYLE-POST-OFFICE-LETTER-SIZE-GUIDE-TEMPLATE-/300597519551?pt=UK_Packaging_Materials&hash=item45fd0224bf

This is all I need apart from a set of basic scales, no guessing no need to faff around at Post office.

I do still get it wrong of course, noteably when I list European postage for worldwide countries and vice versa, but thats me being stupid .

Caroline-Encore

I got my pricing in proportion ruler in Staples for £1.99. Well worth the money