Based on the maths of concentric circles, Concentricity is a fun beret to knit, and is simpler than it first appears. Worked almost entirely in rib, the pattern is worked top down and in the round.


Hat Description

Concentricity is a ribbed beret worked in the round from the top down. The crown consists of three concentric circles of twisted rib, each separated by a purl ridge. As each ridge is reached, the number of stitches within the ring doubles. The body and brim see the twisted rib continue throughout, with one final purl ridge where the body decreases for the brim.


Pattern Details


121 [148, 178] yd/111 [136, 163] m
Aran weight, single or plied yarn; solid, semi-solid or variegated yarns.

Needles & Notions

Set 4.5mm/UK7/US7 DPNS/Circular or size needed to obtain gauge
Stitch marker as necessary
Tapestry needle

Sample Details

Shown in Rowan Pure Wool Aran [186yd/170m per 100g; 100% Wool]
Shown in size 20in/51cm on model with 21.75in/52.25cm circumference head

Alternative Yarns

Lorna’s Laces Shepherd Worsted Solids [225yd/206m per 4oz/114g; 100% Wool]


18 sts x 24 rows to 4in/10cm on 4.5mm needles over Stocking St.
17 sts x 28 rows to 4in/10cm on 4.5mm needles over Twisted Rib


To fit size: 17 [20, 23] in/43.25 [51, 58.5] cm
Finished size: 15 [17.5, 19.75] in/38 [44.5, 50.25] cm
Beret diameter: 10 [11, 12] in/25.5 [28, 30.5] cm

Pattern Notes

Notes about adjusting depth and slouch, and achieving additional sizes, are included.

About our Hat patterns

Each Woolly Wormhead pattern is a short workshop in PDF format. Each pattern is carefully developed and every effort is made to ensure that the instructions are as clear as possible. In addition, the patterns are all multi-sized, professionally edited, and professionally photographed. These patterns will not only teach you how to create your own beautiful knitted Hat, but will also teach you new skills and improve your knitting knowledge!

With each purchase you will receive an email with a download link to the primary PDF. This PDF includes the instructions to make the Hat, and also includes links to in-depth photographic tutorials and where available, supporting videos. These educational resources are provided to guide you through each technique so that you can learn new skills as you make your Hat, all at your own pace. There is also live support available via our forum, where we can answer any questions and provide help where needed.

Once payment clears you’ll receive an email with the download link and instructions - do check your Spam folder if it doesn't arrive promptly. The link will expire after 5 downloads. For further help with downloading and storing files, please visit our FAQ page.

All Woolly Wormhead tutorials, workshops and knitting patterns are colour-blind, neurodivergent, low-bandwidth and printer friendly. The standard PDF format is compact, with succinct and clear instructions that don't use colour beyond the photos on the front and back pages. In addition, some patterns are also available in an LVA format, that is large print and suitable for screen-readers. To see examples of how the patterns are laid out and presented, and please visit the pattern sample page.


Product Details

  • Concentricity beret knitting pattern
  • Designer: Woolly Wormhead
  • Technical Editing: Tana Pageler
  • Translation: Šárka Dvořáčková (CZ); Alessia Càmpera (IT)
  • ISBN: 978-9916-691-38-0
  • Copyright Date: 2010
  • Last Revision: February 2024
  • File Name: WW106KConcentricity
  • PDF File Size: 1.26MB; 150dpi

Additional information


Colour Blind Friendly


Top-down, In The Round




Woolly Wormhead

Instructions Type

Written Only




English, čeština, Italiano

Product Type

Single Pattern


12 Months (17 to 18in), Child/Teen (19 to 20in), Adult (21 to 22in), L Adult (23 to 24in)

Yarn Type

Dip-Dyed, Gradient, Hand-Spun, Kettle Dyed, Self-Striping, Semi-Solid, Single Ply, Solid, Space-Dyed, Variegated

Yarn Weight



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