How do you find the right saddle for road biking? I bought a Cube Attain GTRC disc, a great bike apart from the saddle, which is quite chunky and square. 

I would like to find a better one.  Tips for saddle sizing for road biking?


Long saddle versus short
Cut out or not
thin versus thick
measurement of sit bones? how?
material? 
brands?
length of ride 


I once went to the cycle show and sat on a special seat that displaced blue gel and showed the shape of my arse. Is this recommended? Not sure if I will find these in IKEA though.
It is very much like with shoes: very personal. You look for one until you find it and then you use the same model for as long as possible.

Or, one can use service of a tailor, or in this case, bike fit expert, for a price. Sit bones measurement is one of the most affordable things, as a simple cardboard can be used for that.



For complex cases, a custom saddle can be molded specially for you. See an article by Lennard Zinn at VeloNews.