Here's our guide to the best hats for every holiday this summer 2026.
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Getting the right size is the key to a perfect fit. Here’s how to measure your head accurately and choose the right flat cap size.
We recommend using a flexible dressmaker’s tape for most accurate result.
Not sure how it should feel? Read our guide: How Should a Flat Cap Fit?
Lock & Co.’s flat caps are generally true to size, but personal preference matters:
Most high-quality flat caps are not adjustable — they are cut to size. That is why measuring your head carefully before ordering is so important.
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