• Limited Edition Straw Boater Hat with Lock & Co. Hatters grosgrain house ribbon and bow.
  • Limited Edition Straw Boater Hat with Lock & Co. Hatters grosgrain house ribbon and bow.
  • Lock & Co. 350th anniversary hat box

The 350 Classic Boater

The 350 Classic Boater
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As Lock & Co. continues its 350th anniversary celebrations throughout 2026, we are unveiling a series of limited-edition men’s and women’s hats and caps each month.

June marks our sixth release of the year, with our quintessential British Classic Boater now elegantly trimmed with our fine grosgrain Lock house-colours ribbon and bow. The 350 Classic Boater is a smart choice for those seeking to blend ultimate tradition with contemporary fashion.

Made from pure straw, each piece is carefully hand-blocked and made to be loved for years to come.

The 350 Classic Boater is presented in our limited-edition 350th anniversary box.

PRODUCT DETAILS

Measurements
  • Brim Width: 6 cm
  • Crown Height: 8 cm
  • Band Width: 5 cm
Care

Steam from a household kettle and a hard bristle hat brush to remove dust and dirt. Alternatively, use a soft nailbrush and a little soapy water.

Avoid wearing a straw hat in the rain. If it gets wet, dry using a clean, absorbent cloth or sponge. Should your hat shrink in size, a hat jack can be used to stretch it back to its original shape.

Straw hats are best stored in a hat box, away from direct sunlight.

Materials

Crafted from stiff straw to retain its classic boater shape for years to come, this boater is finished with our fine grosgrain Lock House ribbon and bow, and features a wool inner sweatband so that it stays firmly in place.

Styling & Fitting

This boater is a true classic that you'll have in your wardrobe for years to come.

How to measure your hat size.

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.

HAT CHARACTERISTICS

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

Style
Boater
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.
Material
Straw
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.
Shape
Standard Brim
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.
Features
Breathable
Every part of a hat has its purpose. Discover the features or aesthetic of each hat and how it will specifically enhance your hat-wearing experience.

PRODUCT STORIES

  • Longevity
    Learn more

    LONGEVITY


    Lock & Co. Hatters is the oldest hat shop in the world and the oldest shop in London. Our passion for hats is boundless and our knowledge unrivalled. For 350 years, Lock & Co. has worked with the finest felts, tweeds, cloth, and cashmere, sourced exclusively from around the world.
    Drawing on our unique British heritage and craftsmanship, we create both
    traditional and contemporary hat designs, with scrupulous attention to quality and fit. Our hat shop was established in 1676, making us the oldest hat shop in the world and the oldest shop in London. Every Lock & Co. hat purchased is carefully and expertly hand-prepared in our London shop by one of our Hatters, before it leaves through our famous green front door at No. 6, St James’s Street.

    For centuries, we have supplied some of history's best-known figures with hats, including Admiral Lord Nelson and Winston Churchill. We created the world's first bowler hat (known to hat aficionados as the 'coke'), and to this day our styles remain fresh, trusted and timeless. Royal Warrants attest to Lock & Co.'s commitment to hat quality that is trusted and respected; everything that
    you would come to expect from Lock & Co. – the home of hats since 1676.

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    How To Wear a Flat Cap
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    The 350 Caps
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    History of Royal Ascot Fashion: 350 Years of Lock & Co. at Ascot
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  • Celebrating 350 Years of Lock & Co.
    Celebrating 350 Years of Lock & Co.
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HOW TO
MEASURE HAT SIZE

STEP ONE

Place a tape measure around your head positioned mid-forehead and just above the ears.

STEP TWO

What size is my head? Take note of the measurements in centimetres or inches.

STEP THREE

What's my hat size? Use the hat sizing chart below to find what hat size you are.

Hat Sizing Chart