I bought a Nemo Rhythm 25 Long bag off REI during clearance + discount, but it isn't big enough even if I sleep face up. One arm out and I might fit fine.
https://www.rei.com/product/882687/nemo-rhythm-25-sleeping-bag-long-2014-closeoutLast night I tried it while in a cool (59 degrees) bedroom and while warm I couldn't sleep, maybe 3 hours total. I will try flipping it tonight as the tuck in piece would be now on the bottom.
Also note, I planned on using it while traveling with MTB, to sleep in my CRX with a sleeping platform.....
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If I decide I cannot "fit" in it I'd list it for sale here minus the shipping costs.