From my experience, Sghians are pretty well everywhere in Scotland, but they're generally the touristy type. Mine, I ordered custom and it took a couple of months.
In terms of a Glen, you don't have to measure his head if you can get a look at a favourite hat and see if the size is still marked inside. 
Rev'd Father Bill White: Mostly retired Parish Priest & former Elementary Headmaster. Lover of God, dogs, most people, joy, tradition, humour & clarity. Legion Padre, theologian, teacher, philosopher, linguist, encourager of hearts & souls & a firm believer in dignity, decency, & duty. A proud Canadian Sinclair with solid Welsh and other heritage.
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