InterDesign Forma Drink Coasters - Set of 4, Brushed Stainless Steel/Black EVERYDAY STYLE: Round, brushed stainless steel coasters with black ribbed accents on the base. PREVENT WATER STAINS: Raised edges keep condensation in the drink coaster, not on your table. NON-SLIP DESIGN: Coasters clever rubber ridges grip base of glasses or bottles  prevent slipping. STACKABLE DESIGN: Set of 4 coasters each measure 4.25" Inches diameter x .5" Inches - functional coasters for everyday living. THE INTERDESIGN PROMISE: Bringing you elegant, affordable home products for over 40 years.