No.51 Round Hat Block

No.51 Round Profile Hat Block

Our hat blocks are made to order, so please allow 5–7 business days for processing before shipping. Need yours sooner? Contact us to discuss availability, or browse our Misfits section for in-stock blocks!

Our No.51 Round Profile Hat Block is designed for milliners and hat makers who need a rounder crown shape rather than a standard oval or long oval profile.

This version of the No.51 provides a more circular footprint, making it a good choice for projects where a traditional oval block is not the best fit.

Each block is 3D printed for consistency and is available in multiple sizes.

⚠️ IMPORTANT SIZING INFORMATION

Our hat blocks are made TRUE TO SIZE.

The listed size is the actual circumference of the hat block.

YOU MUST ORDER ONE SIZE LARGER THAN YOUR FINISHED HAT SIZE TO ALLOW ROOM FOR THE SWEATBAND.

For example:

If you are making a finished 58 cm hat, order a 59 cm hat block.

The additional size allows room for the sweatband and helps prevent the finished hat from fitting too tightly.

No.51 Round Profile

This version of the No.51 features a round profile rather than a regular oval shape.

The round profile has less difference between the front-to-back and side-to-side dimensions, creating a more circular shape when viewed from above.

Please make sure this is the profile you need before ordering.

If you are looking for a more traditional oval shape, please see our No.51 Standard Oval Hat Block.

For a more elongated front-to-back shape, please see our No.51 Long Oval Hat Block.

Choosing Your Size

Measure the intended finished head size, then order the next size larger.

Finished Hat Size → Recommended Block Size

56 cm finished hat → 57 cm block
57 cm finished hat → 58 cm block
58 cm finished hat → 59 cm block
59 cm finished hat → 60 cm block
60 cm finished hat → 61 cm block

Half sizes may also be available depending on the selected size options.

Construction

Our hat blocks are 3D printed for accuracy and consistency and are designed for use with traditional hat-making and blocking techniques.

Because our blocks are made true to the listed size, we do not automatically add extra circumference for sweatbands, liners, or other finishing materials.

This gives the hat maker control over the amount of sizing allowance needed for their project.

Returns & Incorrect Size Orders

Please carefully check both the size and profile before placing your order.

Because our hat blocks are made true to size, it is the buyer's responsibility to select the correct size and to order one size larger to allow for the sweatband.

Returns resulting from an incorrect size or style being ordered by the customer are subject to a $10 return fee.

If you are unsure whether the Round, Standard Oval, or Long Oval profile is right for your project, please contact us before ordering.

⚠️ PLEASE READ BEFORE ORDERING

This listing is for the No.51 ROUND PROFILE Hat Block.

Our hat blocks are TRUE TO SIZE.

Order ONE SIZE LARGER than your intended finished hat size to allow for the sweatband.

Example: 58 cm finished hat = Order a 59 cm block.