The oversized fit of Rosemont makes it an everyday favorite. The compound raglan mimics some of the sleeve cap shaping found with a set-in sleeve construction, which contributes to a comfortable fit. Comfort is also found in using a squishy worsted weight yarn.
If you are in-between sizes, I suggest sizing down for an open cardigan like this one. When choosing your size it is always a good idea to check your actual body measurements against all the measurements given in the pattern schematic.
This individual pattern PDF includes instructions for the original top down version of this design. Both top down and seamed versions of Rosemont are part of the collection Home & Away.