Womb chair - medium or regular and in LEATHER?  

Thinner leather - How thin?
Finch
Was just wondering, when you say "thinner leather" how thin are we talking?
Knoll would have us think that Spinneybeck is the standard to judge all else by ( http://www.spinneybeck.com/).
From their specs we're looking at 0.9-1.2mm thickness across their range.
I had a sniff around leather by Arne Sorensen and Elegance (see houseofcopenhagen link below). Their leathers average 1.2-1.5mm in thickness.
Does that therefore mean that Spinneybeck leathers are better for upholstery than the sort of leathers the scandinavian manufactures tend to use?
http://www.houseofcopenhagen.com/upholstery/upholstery.html

2nd thoughts
It's because the sofa and matching other chair are in fabric (beige/tan) that I wanted to go with black leather for the Womb.
But I understand the comment about maybe leather not suiting the Womb, so now it's time for 2nd thoughts. I really wanted to go with a leather chair... Maybe I should think of something else. The Barcelona in black leather is (obviously) terrific but the scale is a little on the small side for the largish sofa and side chair.

Cool picture of Womb in Red Leather
I can't seem to cut and paste it, but if you go to the Spinneybeck website:
http://www.spinneybeck.com/
The their little slideshow run for awhile and you'll see a picture of the Womb in red leather. I think its Volo, but hey thats just a stab in the dark.
Doesn't look too bad actually.

Kevin -- I don't know enough ab...
Kevin -- I don't know enough about the Scandinavian leathers to comment, though, from what I have seen, the Fritz Hansen pieces in their native skins are of exceptional quality.
The thicker the leather, the more it tends to resist adherence to the form of the chair after awhile. I don't know the technical reasons for this, but if the hide is too supple, it just doesn't seem to cling as well over time, esp. with a very curvaceous piece; think Saran wrap as opposed to trash bag.
The Volo should be fine. I had a chair done in Spinneybeck a while back, (Sabrina), and worried about it not holding up as well because it was a thinner leather. It's actually quite nice.

I've seen
I've seen the Womb in KNoll's standard (volo I think) leather. It looked fine - no issues with crinkles on the curves. I saw it when I was poking through the Knoll showroom in Boston.
Personally its a no brainer between the Womb chair and the Barcelona. Barcelona may be beautiful, but the Womb chair is way more comfortable. If you do go for fabric it also looks great in Knoll's cato fabric - which adds a lot of texture to the form.
I know you're set on black, but I think the form of the Womb is so unique it warrants a more interesting color to draw attention to it. Same goes for the other chairs of its ilk - Swan or Egg. Its like, why have such a gorgeous shape only to hide it in a mass of black leather?

Its like, why have such a...
Its like, why have such a gorgeous shape only to hide it in a mass of black leather? ...
Lighting is key in the instance of those chairs done in a dark leather.
Also, the maladherence with certain pieces I referred to takes place after a few months of heavy traffic...not likely that it would show up on a piece in a showroom.

When I was considering this
I always perceived that the chair would look better in Knoll's high grade fabrics. I've seen prints, but the red fabric really looks so definitive. I also saw it in a seafoam green that looked beautiful.
I think the amount of solid surfaces doesn't lend itself as a leather chair...but I feel the same w2ay about the Egg chair.
I'd suggest sticking with wool or some other high quality Knoll fabric.

Well...
Thanks all for your helpful comments. Major re-thinking here. I am not at all concerned about the Volo leather adhering to the curves etc; my main concern is esthetic. Although I haven't seen a real live Womb in leather I also think - as already mentioned - that there would be too much of an expanse of leather and it might not look good. But I also think that the chair is so big that it needs a fabric with some friction to feel good. So... now looking at some of the cloth textiles from Knoll - in particular: Swing (charcoal or jet), Field Day (liqorice), Ricochet (ebony) and Spencer (Shadow). These are all charcoal or blackish...

Everytime I see it in Knoll Red
or orange, I can't help thinking how bright and appropriate those colors are.
I think you're wise to lose the leather concept; the flat face-front aspect of the arms means that any marks to the leather would drive you crazy. I think the quality wool or similar quality Knoll fabric will wear nicely and do you just fine!

if you go to
if you go to Knoll.com and search their photo bank you can see high res images of the chair in dozens of different fabrics