There are top hats – and then there are Lock's top hats. Shop Top Hats

Hat Jack

If your hat has suffered shrinkage, reach for our hat jack tool.

Simply insert the hat jack inside your hat to stretch it back to its original size.

Hat Jack



Small = pink hat jack: fits 54-55 cm hat

Medium = blue hat jack: fits 56-58 cm hat

Large = black hat jack: fits hats 59-65cm hat


This hat jack is made of wood.

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

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.