This is a list of firearm cartridges which have bullets in the to caliber range.
All measurements are in mm (in).
3 mm cartridges
{| class = "wikitable sortable"
|-
! Name || data-sort-type="number"| Bullet diameter || Neck || Shoulder || Base || Rim || Case length || Overall length
|-
| 3mm Kolibri || 3.048 (.120) || 3.810 (.150) || N/A || 3.810 (.150) || 3.810 (.150) || 8.128 (.320) || 10.92 (.430)
|-
| 3mm US || 3.048 (.120) || 4 (.157) || 9.3 (0.366) || 10 (.393) || 10 (.393) || 47 (1.85) || 55 (2.16)
|-
| .12 Eichelberger Long Rifle
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|| ?
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| .12 Eichelberger Win Mag RF
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|| ?
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| .12 Cooper
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|| ?
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| .14 Cooper
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|| ?
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| .14 Walker Hornet
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| .14 Eichelberger Bee
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|| ?
|}