For each season (Fall/Winter or Spring/Summer) I try to get the following for my daughter (age 3) She is not in preschool this year, but hopefully she will be next year. This is my guideline.. dd has been very blessed though, and she has many more clothes that listed below.
From hand-me-downs or garage sales:
3-4 play outfits
1-2 play dresses
From anywhere I can find clothes that *look* new:
1-3 nice outfits
1-2 "church outfits" (this includes a fancy dress for Christmas or Easter)
2-3 pairs of Pjs
Accessories:
one pair of sneakers (usually hand-me-down or garage sale)
one pair of nicer shoes
one pair of fancy shoes specifically for her "fancy dress"
Tights. Enough that she has at least one pair for each outfit with a skirt.
Socks, I buy white athletic socks.. I let grandmas buy "fun ones" Trying to have 7-14pair
fancy socks (the ones that have the cuff and a little lace, for when she doesn't want to wear tights w/ her fancy shoes (1-3 pairs)
7-14 pairs of undies (she still has accidents)
One every day coat, and one rain coat.
My ds, when he was a preschooler (not going to preschool)
3-5 play outfits
1-3 nice outfits
1-2 "church outfits" (Usually black pants for winter & Tan pants for summer, with appropriate shirts for the season)
2-3 pairs of Pjs
Accessories:
one pair of sneakers (usually hand-me-down or garage sale)
one pair of nicer shoes (leather style)
Socks, I buy white athletic socks.. Trying to have 7-14pair
Socks to go with the nicer shoes 2-3 pairs
7-14 pairs of undies
One every day coat, and one rain coat.
When my kids end up going to school I start the school year with 3-5 "nice" outfits. Ds, now 7, started the school year w/ 3 pairs of new jeans. He had a ton of nice t-shirts as most of them were hand-me-downs. So, I had him change his pants into play pants when he got home from school... for 2 reasons. Minimizing the "holey knee factor" and 2, keeping them somewhat clean so he could wear them 2 days (w/ a different shirt each day). For Christmas his wardrobe was rounded out to have 6 pairs of jeans, I still have him wear them 2 days sometimes because he has 2x the number of shirts that he can wear to school.
Edited to Add:
My weekly laundry schedule for my family of 4 looks something like this: (one load a day)
Sunday: Sheets (my bed)
Monday: Lights (pulled from everyone)
Tuesdau: Towels
Wednesday: ds's Darks
thursday: Whites (pulled from everyone) or dd's Darks (she has so many clothes I can easily go 10 days between washings
Friday: Sheets (both kids bed's)
Satiurday: Darks (adult clothes, and anything the kids NEED washed)