Les Petits Chapelais
142 Sullivan St., nr. Prince St.
212-505-1927
lespetitschapelais.com
The neighborhoody store’s sweet, simple silk dresses ($89–$189) and adorable wool pants for boys ($72–$117) are perfect for fall weddings. Look for great traditional styles from brands such as Max and Lola and Judy LaCroix.

Lester's
1534 Second Ave., at 80th St.
212-734-9292
Diesel jeans and bags have made this store a must for hip moms who won't spend Scoop prices on their Mini-Mes. For wee wedding guests, you'll find cute dress clothes from Perry Ellis (pants from $50), European suits (from $275), and ties ($25-$40).

Lilliput
265 Lafayette St., nr. Prince St.
212-965-9567
240 Lafayette St., nr. Spring St.
212-965-9201
lilliputsoho.com
Named for that island of pugnacious little people, this shop will furnish your favorite wild things with fancy threads they'll love to prance around in. There are flower-girl dresses with sequined butterflies ($145-$215), tutu skirts and dresses (from $30), and cute patent-leather shoes to go with them ($75-$115).

Macy's
151 W. 34th St., nr. Broadway
212-695-4400
macys.com
Manhattan's bedrock of retail can certainly deck out wedding-bound tots of all ages. If you want your newborn to dazzle in white, check out the ivory Tommy Hilfiger Cuddly Double Quilt set ($29.99).

Magic Windows
1186 Madison Ave., at 87th St.
212-289-0028
magic-windows.com
If you're up for splurging, this shop is just the ticket. Magic Windows has clothes for everyone from newborns to teens, including picture-perfect party dresses for girls ($160–$500) and tuxedos for the fellows ($200).

Natalie and Friends
205 E. 60th St., at Third Ave.
212-947-2995
natalieandfriends.com
Owner Natalie Mayer wants every child to dress like a star. Standouts include a Victoria Kids dress with a French-lace camisole top and tulle petticoat ($190), Belle Amie silk skirts ($98.50), and a Pif crinkled skirt with silk camisole top ($200).

Prince & Princess
41 E. 78th St., nr. Madison Ave.
212-879-8989
princeandprincess.com
This shop stocks its own brand in sizes 0–14. For boys, one-of-a-kind pieces include silk vests and bow ties that go great with their suits, which are made from a special wool that won’t irritate skin. The red or pink puffy velvet dresses with short sleeves are especially popular with girls. Prices upon request.

Ralph Lauren
872 Madison Ave., nr. 71st St.
867 Madison Ave., nr. 72nd St.
212-606-2100
polo.com
Children up to size 4T will look sweet in wide-wale corduroy suits ($195) and frilly dresses ($55–$225) from the quintessential American designer. Navy blazers in wool ($150-$300) are available year-round. Prices start at $45.

Saks Fifth Avenue
611 Fifth Ave., at 49th St., eighth fl.
212-753-4000
saksfifthavenue.com
Saks makes it easy for your flower girl to look her best while doing her job, although they only offer one brand, Us Angels. Luckily, there are many different styles to choose from and the dresses come in satin, chiffon, or silk ($100–$300). Make an appointment to place an order, and the dresses arrive in three to four weeks.

Shoofly
42 Hudson St., nr. Duane St.
212-406-3270
shooflynyc.com
Your little one will love strutting down the aisle in Shoofly’s colorful, funky shoes. Look for cute-as-a-button Mary Janes ($76) and classic white dress shoes ($76).

Space Kiddets
46 E. 21st St., nr. Broadway
212-420-9878
spacekiddets.com
Glancing at the trendy selection, you’d never guess this store’s been here for 24 years. Look for silk skirts with camisole tops ($144) and seersucker suits ($115–$145), which are available year-round.

Spring Flowers
1050 Third Ave., at 62nd St.
212-758-2669
538 Madison Ave., nr. 55th St.
212-207-4606
905 Madison Ave., nr. 72nd St.
212-717-8182
springflowerschildren.com
These boutiques, filled with swank European imports, supply uptown kids with made-to-order flower-girl dresses (from $398) as well as sharp Italian suits (from $350) and mini-tuxes ($395–$495).

Talbots
525 Madison Ave., nr. 54th St.
212-758-4152
1523 Second Ave., at 79th St.
212-570-1630
800-543-7123
talbots.com
Yes, it’s preppy, but Talbots can be more of-the-moment than you’d expect. The kids’ section has cute boys’ dress pants ($29.50–$49.50) and single-breasted wool blazers ($98). For girls, there are pretty party dresses (from $68) and preppy cardigans (from $38).