Congrats on losing so much weight! You're already on the right track, but for "just in case" I'd keep only a 5 day work wardrobe of the bigger clothes and donate the rest. Hopefully, you will never need to go back to the bigger clothes and if you don't then really get rid of them. I lost about 50 lbs in 2002-2003 but I've always yo-yo'd up and down at least 25 lbs due to overeating, holidays, stress, etc., so I keep a few of my nicest bigger clothes along with the best of my smaller clothes.
"The challenge is to be yourself in a world that is trying to make you like everybody else."
"...rationality is not necessary to sell things.."
My staples: Mane n Tail (cowash), Garnier Fructis Sleek n Shine (leave in condish), Grapeseed oil or shea butter (sealing), Organic Root Stimulator Elasticitea (leave-in condish & light hold)