The wardrobe monster

Will someone please tell me how my daughter (who is only 5, mind) has managed to accumulate SO. MANY. CLOTHES? (That is a rhetorical question; she has so many clothes because all of her friends are bigger than she is and have very generous mummas who give her all their hand-me-downs!)

Her clothes are stored (a term I use loosely....) in a really cute "ShabbyChic-esque" steamer trunk. (One of the old-fashioned ones, with drawers on one side, and hanging bars on the other. It also has "pockets" on it for shoes. I adore it!) She has a set of 12 hangers, and I think that is a good number of outfits to keep in a given size. So, the goal is to make her wardrobe look something like this:

Drawers:
basket with headbands, barrettes, elastics, brush, et cetera
vests ~ 12
knickers ~ 18 pairs
socks ~ 12 pairs (all the same, for ease of mating)
tights ~ 5 pairs white (for church)
pajamas ~ 6 to 8 pairs
summer outfits (shorts & T-shirt) ~ 7

Hangers:
dresses for church ~ 5
white cardigan (to wear with church dresses) ~ 1
school outfits (consisting of the following, hung together as an outfit)
*jeans ~ 6 pair
*long-sleeved shirts (T-shirts or turtlenecks) ~ 6
*"top layer" (sweater, sweatshirt, et cetera) ~ 6

Shoe pockets:
school shoes ~ 2 pairs
church shoes ~ 1 pair
trainers (for gymn at school) ~ 1 pair
slippers ~ 1 pair

Other (stored elsewhere):
Autumn jacket
parka
snowpants
gloves/mittens ~ 4 pairs (1 in use, 1 in coat pocket, 1 in backpack, 1 extra)
winter hats ~ 2
cold-weather boots ~ 1 pair

Notice that there are no "cutsey outfits", just normal clothing. I hope this approach will simplify both our lives, and reduce the amount of yelling that is currently part of our morning routine.

Now, all I have to do is eliminate things as she outgrows them, and only buy (or keep from the hand-me-downs) the specific things she needs to "fill in" the outfits in storage that are too big right now. Up to now, my policy has been to "keep everything, just in case"....but that's what has led to the overload problem we're having, so we obviously need a new policy!