I these days make the former in sizes 16 to 20. You can go down to size 32, but I don’t torture myself with that anymore! I add a strip of Krystal Flash and cover the wing case with Loon UV Finish Thin. I use the more sturdy Coq de Leon feather fibers rather than wood duck. I also nearly always tie them with olive-brown thread to match both March Browns and BWOs. I haven’t found different take rates when I vary the thread colors.
The Caddis Emerger is a size 18, usually. I no longer use ice dub, but, instead, use squirrel for a more subdued body. Partridge feathers are amazingly beautiful, and they’re fun to work with.