This is a chess piece: the Pawn! This pawn is supportless and abides by the FIDE size regulations:

https://www.measuringknowhow.com/chess-piece-sizes/

Thank you, print settings are below, and a full set of chess pieces is coming soon!

Print Settings

• Printer brand:

UltiMaker

• Printer:

Ultimaker 2+

• Rafts:

No

• Supports:

No

• Resolution:

0.15mm

• Infill:

20%

• Filament brand:

Esun

• Filament color:

Black

• Filament material:

PLA+