I have a size 6.5 foot and narrow and these fit generously in terms of width but would be too short for folks with much larger shoe sizes than I have.
They do stretch though so should still fit size 7 or 7.5 too even perhaps an 8 or a narrow 8.5, after that the length of the sole may be a problem even though they stretch. When I first put them on they seemed almost too short so do not overreact, they adjusted to my foot within a couple of hours. Now they are long enough for sure and I have some room left in the front. In fact my toes are swimming in there but I prefer the roomy feeling of relaxed. So if your foot is very small these may also be too long or big.

I really like these type of house shoes they are like socks with a dark fabric sole non skid to walk on for easy wear and care.  Not strong enough for wearing outside much besides maybe getting the mail on a dry day  but around the house they are perfect for me and keep my ankles and lower calves warm without getting  too hot though in a heated house and I can also wear them year round as I had one of these before (blue with orange and white snowflakes) that lasted several years until the knitting stretched out too much and I found a hole near the heel from overwearing them. That is how much I used and liked them. For the price and comfort though and good fit for my type of foot I certainly got my money's worth and think they are a good value if they fit you.

They look pretty cool too, a bit kiddy almost cheesy retro some of the designs and the dark green color depicted in my 2pak turned out to be more the light mint green model I saw listed too, the orange is true to image. I would prefer a more hip design however they have a lot going for them just the way they are for me, enough to override the way they remind me of years ago fashion or Christmas gifts when I was a kid/teen.
I have more expensive muk luks with leather soles and also higher taller versions that are warmer with a decorative drawstring to tie at the top but most of the time I feel drawn to these because they feel right not too high and not too warm just right for me. The quality is average and there are some imperfections strangely enough though they do adjust to my foot so they feel like a nice match regardless.

 If I did not have such a petite foot especially slender too I probably would not think these are just right so it is a hit or miss based on the length and size of your foot but if they fit and remind you of your childhood going skiing, we called them Huettenschuhe which is German as for a ski cabin or alpine lodge in the Alps and they pack well in a backpack or rucksack... these are the kind of memories they emit for me..., you may like them too.
Now I just wear them around the house year round on colder days in Colorado and also take them along on trips they pack well and I find them easy care (gentle wash and dry too) and very convenient. I tried many other types of house shoes but these are still my faves. Most of all, they keep my feet & lower legs at the right temperature where regular house shoes might fail. Prevents varicose veins;) I should add I like to wear Birkenstocks so it could be a style question for some but I have to say health and comfort first when it comes to shoes and my feet look and feel great!