Wiesner Products Inc., a manufacturer of footwear, is relocating its showroom and offices to 20 West 33rd St. in order to accommodate the company's rapid growth. The seven-year deal for the 12,500-square-foot fifth floor will replace its current 7,500 square feet of space at 3 West 35th St. Wiesner will move into its new offices in June and pay $25 per square foot. David Menaged and David Levy of Adams & Co. represented Wiesner, while Steve Levy of Kamber Management represented the landlord, Thirty-Third Equities Co.