Careful, it's deeper than it appears.
A single 45mm D20 (approximately 1.77 inches in diameter; a standard D20 is 20mm).
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All handmade dice have minor imperfections such as microscratches and mold markings that do not affect performance. This gives handmade dice their own unique character. Any imperfections more severe are noted in the description.
Handmade dice may not be perfectly balanced, but neither are factory-made dice. What's important is that they are random enough for TTRPG play, which these are.