Oslo Tweed Flat Cap

The Oslo is a luxurious upgrade from the traditional flat cap.

With a sleek silhouette, this cap is an ideal piece for the man about town and for country style living. Made from sumptuous wool tweed, the cap has inner ear flaps that are lined with soft fleece and can be worn down in colder weather.

Oslo Tweed Flat Cap
Oslo pattern 1
Oslo dark grey



Measurements based on a size EU 59 cm flat cap:

  • Peak Length: 7 cm
  • Diameter: 23.5 cm

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

Dry a tweed cap by shaking off the water and leaving at room temperature.


This cap is made from sumptuous wool tweed and has internal ear flaps that are lined with soft fleece that can be worn down in colder weather. The cap is durable and has a flexible texture to ensure a perfect fit. It is finished with a satin lining and cotton sweatband and carries our treasured label.

Styling & Fitting

With a sleek silhouette, this cap is available in a choice of dark grey or a light green/brown, making it an ideal piece for the man about town as well as for country-style living.

Due to the inner ear flaps, we recommend you choose one size larger.

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.
Wool Tweed
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.
Internal Earflaps Durable
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.