Socks for running

Injingi with the individual toes helped me a lot on long distances and also darn tough socks work well for me.

Just like running shoes all types. Does your foot sweat a lot, are you a minimalistic runner, do you like cushion, do you need support around the arch. Most running socks are cushioned in the forefoot and heel, seamless, and dry wick type material. I personally use the Thor lo experia sock. Works for my foot in my shoe. I would buy one pair try it out and if you don't like buy a different type and find out what works with your foot.

Been a runner for over fifty years and have always worn the same cotton blend socks I wear for most everything else.

Sounds to me like your shoes don't fit you correctly.

What some don't realize is that an athletic shoe should fit you perfectly from the first instant you put it on. There is no break in for athletic shoes.

Leather shoes need to break in, not rubber, plastic and nylon athletic shoes.

I tend to believe that running socks are just a marketing ploy to sell 25 dollar socks. I'm not falling for it.

Blisters are generally caused by two main culprits, moisture and friction. The reason that you haven't had the issue on shorter runs is probably because your socks haven't had enough time to soak up all the sweat, and you haven't had enough time for the repeated friction to develop a blister.

For me, anything under 3-4 miles I'm good with a single pair of socks. Over that, I opt for 2 pairs. It helps to absorb more of the sweat, makes the shoes a little tighter so they can't rub as much, and if they do rub, they tend to rub against each other and not against my skin.

I love my Asics socks. I like my Adidas socks. I hate my Sketchers socks.

That being said, I also have fitness socks from Walmart that I love. They're cushioned in the right places, no blisters, comfy and black.

I like some basic New Balance socks. They were like $12 for a 4 pack.
I also like nice REI wool blends, and smartwool, but they aren't any better than the cotton blend New Balances for me.

Switched to the first dual-layer, non-cotton running socks when they came out 35+ yrs ago. Never had a blister afterwards--running, hiking, etc. There are lots of options out there now and they don't have to be super expensive. While there are some exceptions to every rule, most people should not try to run in cotton socks.
Not only are wicking socks more comfortable, but they will last longer as well. I have some old ultamax (later bought by wigwam) socks that I have been working out in for probably 20 years. The newest workout socks I have are at least 10 years old. From that perspective, a $10-$12 pair of socks is pretty cheap.

My favorite are DryMax. I also have FitSok (great value compared to the premium brands) and Balega which are nice, but DryMax are by far my favorites.

Avoid cotton socks like the plague. You want socks that will wick that moisture away, particularly for longer distances.

I used to use synthetic socks from Costco, and they worked just fine up to about 3 or 4 miles, but after that even those started causing blisters. Socks marketed as running socks may be overpriced, but they make a difference after you get into longer distances.

More than anything, though, your shoes need to fit properly. You want a snug heel so there's no moving around and a large enough toe box that you're not getting any friction up there either.