[Closed] What size stem for drop bars on Kona Smoke hybrid/29er/commuter

Wanting to put some drop bars on my daily hack commuter. Its a 29er and mainly used on road and gentle offroad - converted railway lines etc but is hard work into a headwind as there's nowhere to hide.

What size stem should I be looking at? current one is 105mm by 15degree but is 25.4mm so happy to change if needed? Top tube is 24" and feels ok with current set up.

TIA.

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