Set of 4 & Protective Bumpers: Each package contains 4 natural agate coasters with a total weight of approximately 0.85 lbs. We include clear rubber bumpers; please apply them to the bottom to ensure a firm grip and to shield furniture surfaces from potential scratches. Sized for Small Cup Bases: These 3-3.5 inch coasters are sized for standard coffee mugs, tea cups, and wine glasses. Their compact profile is a space-saving option for desks or side tables. Note: Not intended for larger drinkware or cups with a wide base diameter. Natural Properties & Textures: Sourced from Brazil Geodes, these natural stones are associated with grounding energy. Each piece features a polished top surface and a natural rough crust rim, showcasing the internal mineral formations of the agate. Non-Porous & Stain-Resistant – As solid natural stones, these agate slices feature a non-porous surface that prevents liquids from soaking through. Any spills from coffee, tea, or wine stay on the polished top and can be wiped clean instantly with a damp cloth, keeping your coasters hygienic and pristine. Natural Variation: As these are natural earth-mined stones, colors, patterns, and exact shapes vary from the photos. This variation is typical of geode slices, making each set unique for housewarmings or mineral collections.