I can't answer for your location. I have my PRBC transfusions in Oakville Ontario Canada. Each bag is marked with the donation date, expiration date and volume.
I've had a bag with volume slightly below 250ml (248ml) and well over 300ml (361ml). In general the majority of bags I have received falls between 250ml and 300ml.
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Ric: Low-risk MDS (blasts <4%); 4 cycles Revlimid no positive response; PRBC transfusion dependent; so far, 392'units' over 8 3/4 years; BMB #4 (15/04/01) shows evolution to AML (blasts 20-30%
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47,XY,del(5) (q22q35),+21[24][cp24]/46,XY(1).