Thank you all for your help.
Kerri, I think I'm going to order the M&S ones you recommended. I just want to make sure "tights" mean pantyhose. They look like pantyhose in the photo, but to me, "tights" are the thicker, opaque ones that women wear with casual skirts/dresses. I am a bit confused by the "denier" gauge as well. I guess the smaller the denier number, the more sheer the hose is. Maybe I will order one in the 10 denier and one in the 15 denier (actually I found 3 in the XXL. I'd rather have them a bit big if possible).
Thank you again so much!