I think you should be ok with your 37; I am a 6.5-7, average width, and that is the size I chose. I know my true size is 6.5 (when measured), but I always buy 7s because I need the wiggle room for my toes (don't want bunions!). My foot size is 9" x 3.25" Most of my shoes are 7 and I have a few 6.5/37 (sandals, European styles). I was debating getting a 36 in the Dicker boots, but I don't think I will have much toe room. I may be able to stuff my foot into them, but my toes would feel cramped and my big toe may eventually wear a hole into the upper. They may also stretch unevenly and look strange on my foot. I have purchased a size 6 in Minnetonkas and Uggs, but those run a whole size large.
The 37 is a good size for me. Barefoot, I have wiggle room for my toes, but the boot isn't loose (doesn't flop when I walk). I don't wear boots barefoot anyway, and plan to wear a thin ankle sock with these - which makes them fit snug. When I walk, the boot actually feels snug in the heel, unless I slide my foot forward. I still have a bit of room in the length, but not enough to size down a whole size. If desired, I can put an insole in.
I hope this helps out. Shoe sizing can be difficult, especially when purchasing online!
Thank you all for the great ideas and encouragement to keep trying. I have my work set out for me. Let's hope perseverance pays off.
they are so comfortable to wear. Much kinder on the feet, especially since Im walking around alot during the day