Mixture of average size: 500 crystals Thermal Glass Round shapes 4 sizes s6-s10-s16-s20 blend. All of these rhinestones are patches with sparkling facets. These rhinestones can be attached to warm with a strass Iron or an iron on all surfaces such as paper, card, fabrics, cotton or other mixture. Not suitable for fabrics. Instructions and ideas to pose on the web are looking for: Video strass. One press hot approx. 180 ° 20 seconds and allow to cool. Glass Rhinestones are made from 8 to 16 facettes. the Strass may vary +/-5% Diameter: Ref: S06 = (2,1 mm) -réf: S10 = 2,9 mm - Ref: S16 = (mm)-Ref: S20 = (4,8 mm). If you have purchased by mistake you may return within 14 days and a refund or replacement.