The Frostgrave Knights box set (covered here) builds eight figures. The bodies are compatible with the Oathmark range and provide an opportunity to build command figures.
This knight uses the closed helm from the Oathmark Human Infantry set.
He has also had a large pouch added.Size comparison with the Oathmark Human Infantry.
The second Knight is for the kingdom that uses the Brodie style helmet. This is the Gladiator style helmet from Anvil Industries. This required the neck hole to be opened up using a 3mm drill.
The standard hand weapon for the infantry is the mace, so this knight is also armed with a mace.
Comparison photograph between an Oathmark Human Infantry Man and the knight.