Assertion: double bass's size | /r/HasProperty | 15 inches
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Source sentences:
text: Common sizes include 17 inches (430 mm), 16 1⁄ 2 inches (420 mm), 16 inches (410 mm), 15 1⁄ 2 inches (390 mm), 15 inches (380 mm), 14 inches (360 mm), and less commonly 12 inches (300 mm), smaller than a standard violin; These measurements are nominal and approximate.