Discover our exclusive collection of Kentucky Derby hats for women. Shop Now

Grosvenor Check Flat Cap

Our Grosvenor Check flat cap was born ready for winter.

This smart, but understated cap has now been re-imagined in an electric blue and brown city check, that looks and feels effortlessly cool.

Grosvenor Check Flat Cap



Peak length: 5 cm, Peak width: 17 cm


Steam from a household kettle and a hard bristle hat brush will help banish any dust and dirt from tweed or cashmere. Brush the hat using short strokes.


Fabric composition: 75% Wool and 25% Angora. Fully lined and finished with our illustrious white Lock & Co. Hatters logo on the inside.

Styling & Fitting

The Grosvenor is a modern classic that is ideal for the trend-conscious gentleman.

How to measure your hat size. Read More

Hat Size Chart

Men's Hat Styling

Every Lock & Co. hat purchased is carefully and expertly hand-prepared in our London shop by one of our Hatters, before being whisked out of our famous green front door.

To find your perfect hat size, we suggest booking a virtual appointment for a consultation with one of our hatters here.


At Lock & Co., we sell the finest hats and caps. To achieve this, we pay particular attention to specific hat characteristics - style, fit, durability, and materials. We share these characteristics with you for each hat to help you decide on the perfect choice.

Find Your Size and Style

Flat Cap
At Lock & Co. we offer a wide selection of styles of hats. What defines a hat style is its form: overall shape, height/shape of the crown, width of the brim, and material type. These define a style e.g., Fedora, Trilby, Panama, Cloche, Tweed cap etc.
75% Wool 25% Angora
Lock & Co. hats are made of the finest quality material. These can range from exclusive Escorial wool, Scottish Tweed, and cashmere to Toquilla straw for our Panama hat.
Narrow Shape
Different styles of hats have different shapes to them, including classic, fuller, narrow, and standard fits, or with an oversized or a wide brim or sporting a particular shape - bell, birdcage, etc.