Adults grow to about 60 centimeters (24 in) in length. The largest, at around 90–104 (35–41 in), are found in Scandinavia. In France and Great Britain, the maximum size is 80–87 centimeters (31–34 in), weighing from 50 grams (1.8 oz) to about 180 grams (6.3 oz).
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