what is a "size 28" saddle? please help

Yes, depends on the brand of Saddle - it's a measurement in cm of gullet width. Just bought an Ideal Jessica Wide - it's stamped 34cm, so wide fit in Ideals is 34cm. Stubbens have different measurements of wide, medium and narrow - if you google "saddle gullet width" and e.g. 30cm, you will find explanations. HTH.
 
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