I have both a 25 and 30 Speedy B. I can wear the 25 very comfortably without bopping into tables, people, doors, etc...However, when I wear my 30 I am always hitting into things. Especially since I use either an organizer or base shaper in my 30 to maintain that beautiful shape. More times than not I bop something, feel awful, and then take the strap off and put it into the bag. I recently got a Speedy 30 for the holidays. I got it in the 30 Classic...no B. I think going forward, the only 30 B I would get if it was a bag that was a LE (such as the Tahitienne) that ONLY comes in a 30B. Hope this helps. I attach a strap to the classic if I need to be hands free. I have a 30 Classic vintage and have done this for years with no damage. Eye candy below.
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My Monogram Speedy 30 Classic.
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My DE Speedy 30 Classic.
I love the leather flowers on your mono speedy strap. Where is the strap from?