I bought my girlfriend the Feathered Friends Murre EX Zero Degree Women’s Sleeping Bag, length medium, color ocean (blue). Used it twice, but it’s so long for her. She’s 5 foot 1 inches tall. I should have gotten the size small, not medium. Would anyone like to swap for a shorter zero degree bag? Or buy it for $650 so I can then order the smaller one? Thanks! Dennis