L Long Sleeve Inner Gray Cut and Sew Simple Thin These long sleeves are perfect as an inner layer, similar to Heattech, being light and thin. They stretch well and feel good against the skin. I bought too many, so I'm selling some. In my experience, the ones I've used have lasted for two years. I think they are a good product. Size L, but stretchy, so it should fit M as well. Total length: 60cm Bust (approx.): 33cm Sleeve length: 54cm Measured one of the multiple items I have.