The gown fits well, overall, but for the taller sizes, you may want to add a bit of sleeve length--as many tall boys have longer arms. It does not fit my long-armed son quite right, but will have to work. The cap needs some adjusting of the "point," as it comes down very far on his nose. I have seen several people try this cap on, and it only fit one well. I suppose a one-size-fits-all cap is difficult, as head shapes and sizes are very different, but the most common issue with the fit was that the point was far too deep. I will have to adjust it for him and make it work, as the rest of it works okay. >>>RESPONSE FROM HOMESCHOOL DIPLOMA: Hi Wendy, thank you for your feedback! We absolutely want you to be 100% satisfied with your purchase and would be happy to exchange the gown for a different size. We'll contact you via email to arrange this. As far as the point of the cap is concerned, it may be that your son is wearing it backwards. The point in the band of the cap is intended to go in the back. See the photos of this product for reference.