This is my first try of the long sleeved - I have six of the t shirts and love them.  I ordered medium and it's slim fitting, ok because I wear it primarily under tunics, etc. I ordered a second one in navy and did order the large.  I love the fabric, neckline and length on these and find that with appropriate care, they wear well.  All purpose - I wear them to yoga, wear them with jeans and with casual slacks.  I wish the longer sleeve came in more colors or that they had a 3/4 length sleeve.  Watch out for dye irregularities; I just exchanged a t shirt and had an earlier one in which I didn't catch the irregularity in time to return it.  It was OK after I washed it, but it does seem to be the only flaw I find with these shirts.