Thank you for viewing! This is a Design F coat, perfect for this time of year. I fell in love with it on this site and purchased it, only to find that the size didn't fit. I only tried it on at home and have kept it stored since. The quality and size tag were not attached when I purchased it, but I was told the material is wool. For reference, my dog is a 3kg Maltese with a thick chest and a muscular, sturdy build. The fabric has no stretch, so I think it would be suitable for a slender dog. Thank you for your consideration. Size (measured flat): * Neck: Approximately 11cm * Chest: Approximately 17cm * Length: Approximately 24cm Please note that these measurements are approximate due to being taken by hand.