I use hylix saddle. Everything fine, till now.

eBay seller confirms dimensons as
270mm length
125 width
and rails as round 7mm cross section

this bidding thing at eBay must get people excited.

the last bidding ended at 78 bucks plus 10 for shipping.
they have the same item as buy it now for 85 bucks with free shipping

mentioned in my first post is this one. pls compare price and weight
http://www.chainreactioncycles.com/Mode ... elID=26989" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

On the other Hylix saddle (non-split), the seller confirmed the dimensions as:

looks pretty sweet! Ive never ridden a full carbon saddle. I know for saving grams its a good option, but my rear needs a little bit more padding than that I fear.

I've got one of the Merek full carbon saddles off ebay that fits me really well. Weighs around 100g. The only other saddle I can use comfortably is an SLR.