Probably one of the biggest concerns and doubts people have when purchasing a replica medieval helmet is whether it will fit their head. Of course, if you are buying just for display, then this won't matter. However, most people like to pop it on every once in a while to appease the more eccentric side of themselves. While most helmets are going to be a one-size-fits-most, certain types of helmets are going to allow more room for your head then others.Roman helmets are popular helmets used for Passion plays, costumes, and reenactments. Fortunately, most Roman helmets are going to be made on the larger side, often times exceeding 23 inches in diameter.

This goes for the Centurion helmet as well as the common trooper helmet. In fact, most people will need an arming cap or helmet liner to make the fit more snug. Medieval helmets are going to be a little bit different. In general, these are made a little smaller than Roman helmets.

The Crusader helmet, sugar loaf, and similarly constructed helmets are going to be larger in size and will fit most people. However, helmets such as the European Close Helmet and the Viking Horn helmet are going to be about a medium size, so half the people can wear them. Basically, any helmet that has a close front and a tight neck opening is going to be harder to get on. Ask your local online retailer whether their helmets are made large enough for your head.

Lastly, Greek helmets (such as the Italic Corinthian, Spartan helmet, and Trojan helmet) are going to be on the larger side also. This is because the fronts are going to be more open, allowing for more room. In general, they can fit hat sizes up to 7 ¾ or more, so you may very well need an arming cap to make it more comfortable and snug.The important thing to remember is that most helmets are made in India or Europe and are a one size fits all, so they are constructed to fit the masses. There are some companies that have different size helmets (such as Casiberia), but those are rare. If you are planning on wearing a helmet, such ask the store what they think will fit.