I am planning to buy the core set from the online shop,
I would highly recommend not to do that. Get it on amazon, ebay, coolstuff inc or miniature market. You are going to be paying way more buying stuff from this website just because its Fantasy Flight's Website. For example, the core set is only $30 on Amazon with free shipping. But its going to be around $50 (with shipping costs) if you get it from fantasy flight online store. Same product for $20 more. You could use that $20 to buy 2 Adventure Packs or a duluxe expansion. Its your money but I thought I'd let you know that you can get it a lot cheaper.
Anyways, for sleeve size you need "Standard Sleeves" or sometimes called "Standard Card Game Sleeves" They are 63.5 x 88 MM. What brand of sleeve you get is a very controversial issue. Although each brand is "Standard Card Game Sleeves", they all are slightly different in size, quality and feel. This is what I can tell you.
Ultra Pro Sleeves - They have a small, little hologram circle on the bottom corner of the sleeves which some people find annoying. These sleeves fit the card very well however. Fairly cheap.
Dragon Shield Sleeves - These are top tier sleeves. Very high quality and fit cards almost perfectly. However, these are very expensive sleeves.
Mayday Sleeves - They fit the cards very good. They are the cheapest sleeves out there. Not as high quality as Dragon Shield but they still are sleeves and they protect your cards. Personally, my favorite.
Fantasy Flight Sleeves - They are made just a little bit big. They have a little flap of extra sleeve on the top and a tiny bit on the sides. These are very good sleeves however. If you don't mind a tiny bit of extra space. These are aren't cheap, but less than Dragon Shield.
Ultra Pro and Mayday actually have about 3-4 different types of quality sleeve for standard card sleeves.
For example Mayday has 3 different quality Standard Card Game sleeves. They have:
Almost a penny sleeves (Lower quality)
Card Game Sleeves (Average Quality)
Premium Card Sleeves (Higher Quality)
They are all fit LOTR LCG but they are just different quality, feel and how perfect the fit.
Same thing goes with Ultra Pro's.
You have to decide if you want higher quality and pay more or the opposite.
Yes I know, buying sleeves is very confusing......I'd recommend buying a few different kinds and seeing which ones you like best, then get a bunch more and sleeve your game.
Hope this is helpful,
Edited by Khamul The Easterling, 06 July 2014 - 11:44 AM.