Packaging soap - oh dear, there are so many things you can do!
Great suggestions from everyone here, and the input from Reflections about using pinterest is a really good one too, because Pinterest is a huge encyclopedia of how to pack or decorate anything, or everything in this world, without becoming bankrupt.
Although I don`t sell my soaps yet, I am a person who like to see what I am buying. Meaning I am not the one who shops for already giftwrapped items that is completely hiding what is inside. I am not talking about tubes of mascara or pantyhose, but whatever items I want from a store and that I at least can give a quick once-over to see that it isn`t cracked, broken, ripped or damaged. Handmade pieces of soap would go in this category, also because I want soap to smell good, and look good. I would perhaps expect at least a small sniffer hole or something. If a soap is supposed to smell like Lilacs I would like to check if I like the scent.
Soap packaging with a small window & a small sniffer hole would protect and still show the soap.
I have used small, closed cellobags when gifting. The are inexpensive, easy to get a hold of, and are easy to use.
After the soap is in the bag and the bag is closed properly, I cut a hole in each corner of the bag so the soap can breathe freely and also release scent, but being protected from dust, fingerprints etc. It looks looks clean, it doesn`t hide the scent and people can see and smell the soap without having to unwrap it right away. I can decorate it, add a label, sticker etc.