You quickly remove your bra and use a hair tie to pull your hair into a low bun at the nape of your neck. Picking up the blue wig, you settle it on your head and begin tucking your own hair under, arranging the synthetic waves to flow around your shoulders. The wig has long bangs that you part slightly to look natural, and it's longer than you thought, thick, blue curls wrapping around you to elbow-length, almost hiding your breasts and caressing the small of your back.
You know you can't leave your top half bare though, as the hair won't hide things when in motion. Untangling the seashell "bra" from the hanger, you slip the rope over your head so the shells rest over your boobs. Untucking the wig hair, you tie the string at your back, slightly uncomfortable with the coarse twine rubbing your skin. The shells actually don't feel too bad; they're obviously real seashells, but you must have just gotten lucky as they seem to be the perfect shape to cup and slightly support your modest rack.
Picking up the tail from where you'd draped it over the changing room stool, you stand on your left foot to slide the first leg in. The wetsuit material doesn't make this easy though, catching against your flesh like rubber until your right foot finally pops out the bottom. Standing with one leg in and the other out, you realize it might be easier to sit on the stool as you guide your other leg in. In just your panties, you sit on the padded cushion and begin to slide your left foot down along your right leg. It's really tight, and as your foot finally reaches the hole you wonder how you're going to walk with your legs squished together like this. You wiggle your feet, but there's not an inch of give from your thighs to just above your ankles. Using one hand to press up and off the stool and the other to balance against the wall, you rise to stand and pull the tail the rest of the way up and over your hips.
"Shit." you think. "I hope I don't need to use the toilet at the party! This thing is almost impossible to get into, I can only imagine how difficult it'll be to get off! Gonna have to limit my drinking a bit..."
Waddling in place, you turn to inspect your look in the mirror. The tailfins laying in front of your feet are definitely awkward - you're going to have to kick them ahead of you with each step so as not to trip. That's if you can actually walk at all in this skirt! Gazing into the mirror, you're very pleased with the overall look. The thick, weighty latex of this costume gives it a much more realistic look than some flimsy material with sequins would. The seashells have warmed against your boobs and you can hardly feel the string holding them up. The wig really tops the costume off, and you can only imagine what the effect will be with some shimmering makeup. Maybe the store has some that you can use to paint a few matching scales on your arms and hands.