For daily wear in boots I like these. They definitely aren’t BIFL (no merino socks are unless there’s a warranty, but these don’t have one). I have a hard time with tight socks and I like these, though they have been a little different each time I ordered. They were amazing four years ago, this time around they’re thinner and more synthetic feeling but they don’t stink for days (so ik they have merino) and for the price they’re a good deal imo. Agree with others that Smartwool socks are looser/comfier as well, though I’m not sure they have a warranty like Icebreaker or Darn Tough. I used to wear the Icebreaker light hiking socks all winter (northern Midwest, 30F to -10F most days). But they either didn’t like the enzymes in my tide detergent or the baking soda in the second detergent (which I only used on Icebreaker’s recommendation) because they got really hard and stiff feeling. Anyways, if you already use a wool wash, then Icebreakers are great and have a warranty. I have one pair of their crew socks I got as a freebie that I would buy more of if they were cheaper (definitely not tight, and way better than the Amazon brand I linked if you can afford them).

I’d try going up a size.