Orthodox Clerics Kalimafhi.
In the Greek tradition, monks wear a simple black kalimavkion, covered by a black veil (epanokalimavkion), but ordained clergy (both married and monastic) wear a kalimavkion with a flattened conical brim at the top. Hierodeacons (monastic deacons) remove the veil when they vest for services, but hieromonks (monastic priests) do not. In the Greek tradition, nuns do not normally wear a kalimavkion, but rather just the veil.
For the measurments is very imporant to have the top head's perimeter. During the checkout process there is a comments text box where you should complete the above measurements.
Calculating Your Own Hat Size.
To calculate your metric (European) hat size a measurement of the head circumference should be taken in centimeters. This is best achieved by passing a cloth tape measure around the head. Alternatively a piece of string may be used and measured against a ruler or tape measure. It is important that this measurement is taken where a hat would normally rest. To take a measurement position the tape measure or string so that it rests just above the brow at the front of the head, touching the top of the ears at the side. Pull the tape so that is taut but not too tight and take a measurement.