Considering SMP saddles with a full length cutout. They have sizing guidelines. At 135 lbs or less, I use the models in the narrow width group and standard padding, which is the stratos model. Larger riders will usually need one of the wider models. I use high quality bibs too. My current bibs are pro corsa. They occasionally go on sale for less than the current price. They run small. Even I need a medium.

https://www.biketiresdirect.com/prod...-bibshort?sg=1