I ride with 39cm wide Syntace Stratos 200 on my bike. They're quite comfy.

46. Flat bars w/ bar ends.

I assume you mean the Nashbar tt bars? Yeah, they're probably great for someone who's 6'. However, I'm only 5'4" and even though I ride them at present, they're definitely too wide for me.

I ride an old pair of road bars. 34 to the best of my knowledge. They are the most narrow drops I have seen and I love them to death cause I can fit through anything.

Nitto makes B123s in 34cm...i almost bought them at the shop i got the 36s.

Nitto B125 (shallow drops) 38cm.... risers 42.4cm..... bull horns 42 cm.

36cm drops
37cm risers
37cm bullhorns

42 time trial bullhorns, kind of want some narrower ones though. i might get a 39 or 40 in the future

~38 risers

36/38 track drops 38 road bars

I measure something like 44 cm at shoulder. I use a variety of bar widths.
44cm - geared roadie
42cm - fixie with road drops (my favorite width for drop bars -feels narrowish for my size, but not too narrow)
40cm - track drops
way wide (easily > 50cm) - ssmtb with riser bar

42 drops
67 for trials.

Although 38-40 would be nice on drops.

I guess this is all relative to the type of riding you're doing, but you'd be totally out of luck on 50% of the singletrack I ride. 58cm is way too wide to fit through the gaps in the trees around here. My post is unrelated to SSFG riding.

I'm running 40cm b123's. I like the look of the b123's when they are smaller, but they are just way too small for me. I have big shoulders :). I run my drops most of the time.

My flat bars are 34cm. I like them small. They suck for climbing though.

BS. The terrain (at least treewise) is pretty similar in both our areas, and I run uncut Mary bars which are 640mm end to end, and I don't have too many problems. You just can't fly through the tight squeezes is all.

38cm road drops now, I haven't had a chance to ride on them yet though.

That's what I'm saying. It's a preference, so there's no sense arguing about it.

25"/63.5 cm risers on snow bike, 53 cm flats on commuter, 42 cm road bars

42 Oval Bullhorn
It seems to be narrow enough to fit through most tight spots I get in and feels just fine with my shoulder width. Its also about exactly the same as whatever the bars are on my Cyclo Cross bike so it feels similar

on this subject: i'm looking into getting new bars and want to go with slim bullhorns/tt bars. nitto seems to be the best brand for the money, but as far as i've seen they only make drop bars in 36-38cm. should i just buy narrow drop bars and saw them off?

Haha, my MTB bars are 67cm uncut risers. Guess I'd have issues too.

My flats are 38cm and my drops are 40.