Dude, joke's totally on them, you should make a t-shirt that says 'all you fools suck' and on the back it can say 'I rule coz T-dawg said so' and yeah, you'll be rockin it shibby, new steeze brah, wikkid! ~PhattTim
I do bootfitting at a store where I live. First off you need to go to a store first and see what fits your foot. Every company has a differently shaped last inside the boot so some companies may fit your foot batter than others. But after you find out what feels best on your foot, then you can go out and look on the internet. Normally if someone says they are a size 10 shoe, they would go with a 27 or a 27.5, sometimes even 26.5. Just to give you an idea, I wear a 9.5 shoe, and take a 26. And the difference between the 27 and 27.5 is that in the 27.5 the bootbed is thinner which gives you more volume all around your foot. But they 2 sizes have the exact same shell. So again, go try boots on in the store first, see what fits, then do whatever ya want.
Hmm, guess I'll throw my hat into this ring.......Internet works if you know what yu're looking for specifically (i.e. Give me a 1080 foil in size 26.5)..........even if you know what size your shoe converts to in Mondo Point sizing (what ski boots size with)..every company has a different fit (generated through shell width, liner type, materials, etc, etc).........if you go to a shop and have people do a good boot fitting on you (meaning they actually check the liner, put in an aftermarket footbed for you to test, even go so far as to do canting, spoiler changes, etc) buy the boots from them or give them the option to match the prices you've seen......and Yes, I do run an online and real-life ski store.........and it blows smoke up my ass when you dial in the fit on somebodies boot for an 1 1/2 hours and then they tell you thanks but no thanks.
Not to be a jerk or anything.....I just know that when I do a bootfitting, you're gonna be hard to pressed to make that boot fit that good (even if you buy the same exact boot online)...............
Now, if you want to buy boots online....my shop and several others offer the option for you to purchase two pairs of boots and a return UPS label so if you're having a tough time deciding, you can get them both...try them and return whatever size doesn't work.
Sorry, the main point of my ran and raving was to say....at least go to a shop and have them measure your foot........everyone has their "I ski this and wear this"...i wear a size 9.5 sneaker and ski a size 25 MP boot....so you can see their is a great difference between what people wear and ski.