We wear these robes everyday! It’s the perfect holiday gift! For size reference, I’m 5 ft 115 pounds and have tried both the S/M and L/XL. After washing, the S/M shrunk significantly and became a tad tight. I have the L/XL now and like it so much better. It is very roomy but feels so much more comfortable. If you like just the right fit, I’d recommend going with your TTS. If you like an oversized fit, I’d recommend going up a size. As for the toddler one, Kins is 3 yrs old and 40 inches, wearing the 4-5. It is oversized on her but we hope she’ll wear it for a few years. LTKHome LTKKids LTKStyleTip