Four seasons Celtic knot in hallmarked 925 Sterling Silver. Hallmarked 925 Sterling Silver Chain: 0.5mm thick. Lengths available: 16, 18, 20 Significance of Four Seasons: Spring, Summer, Autumn & Winter ruled all aspects of ancient cleric world. This design reflects the linking of the seasons as we journey through the year, as it is repeated throughout eternity. Protection & healing are the attributes of this charm. Dimensions: 9mm x 9mm Sterling Silver 925 curb chain closed with a bolt ring fastener. Available in lengths 16, 18 & 20. Thickness: Fine : 0.5 mm Celtic Pendant - Four Seasons Knot-Hallmarked 925 Sterling Silver-Edinburgh, Scotland