• Take advantage of La Perla's "Fit Day" to make sure you're buying the pricey lingerie in the right size. Bergdorf Goodman, 754 Fifth Ave., at 57th St., sixth fl. (212-753-7300); 10–8.
• Meet Rachel Roy today when she stops by Saks this afternoon to preview of her fall 2008 collection. Saks Fifth Avenue, 611 Fifth Ave., at 50th St., second fl. (212-753-4000); 1–2.
• The Naeem Khan trunk show begins today at Bergdorf Goodman. Bergdorf Goodman, 754 Fifth Ave., at 57th St., fourth fl. (212-753-7300); 1–4.
• The once-a-year Hermès of Paris sample sale starts tomorrow. Both men’s and women’s collections will be marked down. Through 3/22. Metropolitan Pavilion, 123 W. 18th St., nr. Sixth Ave., fourth fl.; Wed. (10–6), Thurs. (10–8), Fri. and Sat. (10–6).
• Makeup from Prescriptives is 25 percent off at the brand's first-ever friends and family online sale event. The AnyWear Multi-Purpose makeup stick with SPF 15 is now $26 (was $35). Just type in FFSP8 at checkout.
• Boutique on 57 offers shoes, dresses, and accessories by Chanel, Valentino, Gucci, and more for up to 70 percent off at this private sample sale. Score handbags from Yves St. Laurent and Dolce & Gabbana. Shoes are $125 (were $680), and dresses are $750 (were $5,500). Through 3/19. Regency Hotel, 540 Park Ave., at 61st St., penthouse suite (917-940-9934); 10–7.
• Lauren Merkin's raffia totes (now $175), silk-lamé clutches (now $80), and other cute bags in every swatch imaginable are marked down by 40 to 70 percent. Through 3/20. 231 W. 29th St., nr. Seventh Ave., Ste. 201 (212-239-2459); 3/18–3/20 (11–7).
• The Project No. 8 sale offers clothes by Loeffler Randall, Maison Martin Margiela, and Tucker for 50 to 80 percent off. Through 3/22. 215 Centre St., nr. Grand St. (212-219-1693); 4–8.
• The green trend hits the sales department, as (eco)mpassion's "carbon neutral designer sample sale” starts. Find up to 90 percent off Joe’s Jeans, People’s Liberation, Citizens of Humanity, and more. Five percent of sales are donated to Trees for the Future. Through 3/23. 2 Great Jones St., nr. Broadway; 12–8.
• Denim and select designer apparel is 35 to 80 percent off at the Art of Shop spring Soho sample sale. Find Seven For All Mankind and Monarchy in the denim section; a selection of spring items by Versace, Costume National, and Just Cavalli are expected, too. Through 3/23. 76 Greene St., nr. Spring St.; Thurs. (2–7), Fri.–Sun. (11–7).