dress code

When you sign up for recruitment you'll get emails before each round saying the dress code! But for example, this is basically all you have to know:
tours=casual but not sloppy, show off your own style, pants/nice jeans are fine, sneakers are fine too if they're clean and nice
invitationals=more fancy like if you were going out for nice brunch, skirts/sundresses/nice tailored pants, probably better to wear nicer shoes/sandals
prefs=the most fancy but not too formal like prom or something, wear a nice dress and heels
bids day=super casual, wear something comfy

UBC Sororities has a Pinterest board that has examples of outfits for each round if you want to look at it :)

Other people have pretty much covered it, but wear something that YOU love and will feel comfortable/happy in during each round