I already gave you the method to find out the price for your item :)

If you use the Royal mail calculator that will give you the price, just make sure the stamps you put on meet or exceed that value.

[quote="kimmylee"]Anything over 5mm thick can't go as a letter, it has to go as a Small Packet which is considerably more expensive, prices are £3.80 for 0-100g and £4.75 for 101-250g.

Based on current stamp values (which you can find on http://www.royal-mail.com or by a simple google search) 2 1st large letter stamps would be nowhere near enough.

The website I linked to also has a price calculator which you should find useful as you have all the info it needs {up}[/quote]

I have 4 Red Large 1st Class Stamps and just ordered this [url]http://shop.royalmail.com/christmas-2014/christmas-2014-smilersr-generic-sheet/invt/20141104[/url]. Should this be enough?

Anything over 5mm thick can't go as a letter, it has to go as a Small Packet which is considerably more expensive, prices are £3.80 for 0-100g and £4.75 for 101-250g.

Based on current stamp values (which you can find on http://www.royal-mail.com or by a simple google search) 2 1st large letter stamps would be nowhere near enough.

The website I linked to also has a price calculator which you should find useful as you have all the info it needs {up}

Yes, You can add more stamps if you want to post bigger items.

[quote="IantoWilliams"]Hope this helps:

http://www.postofficeshop.co.uk/search/royal+mail+postage/?gclid=CJKapeG0wcICFQjLtAodDAwABg[/quote]

If my weight is over the 100gm amount can I just use 2 of the Large 1st Class Stamps?

Hope this helps:

http://www.postofficeshop.co.uk/search/royal+mail+postage/?gclid=CJKapeG0wcICFQjLtAodDAwABg

I'm trying to figure out how much postage and what type of UK postage stamps are need to mail a 228.6mm x 304.8mm envelope that weights 150 grams and is less than 12.7mm thick that will need to be mailed from London to the US.

Any link to the correct stamps would be greatly appreciated!!!!!!!!