Reflecting Harry Bertoia’s experiments with wire grids and geometric form, Diamonde uses repeated diagonal squares to create a pattern that expands and contracts across the fabric. Inspired by his Diamond Chair, the design plays with both structure and negative space, translating its sense of movement and openness into knitted colourwork.

Each Hat in the Iterations collection is knitted bottom-up and in the round. The ideal yarn for these Hats is 4-ply or light sportweight, in a multi-plied fibre with some natural give, such as merino.

This pattern is available individually, or as part of the Iterations collection eBook.
 
Hat Description
Diamonde is a stranded colourwork Hat worked from the bottom up in two colours. The colours are equally weighted in the pattern, using two-stitch and two-row patterning. The Hat starts with a corrugated rib brim that’s finished with a lateral braid. The body pattern features a diamond pattern, which alternates and repeats vertically all the way around, creating a striking graphic effect. The crown features the diamonds converging towards the centre.
 
Pattern Details
Yarn
Yarn A: 94d/86m; Yarn B: 127yd/116m
4ply/Sock weight or sport weight, plied yarn; high contrast solid, semi-solid or variegated yarns.

Needles & Notions
Set 2.75mm (3mm) DPNs/Circular or size needed to obtain gauge
Circular needle, 2 sizes smaller
2.75mm (3mm) crochet hook
Stitch markers as necessary
Tapestry needle

Sample Details
Shown in Malabrigo Arroyo shades ‘Pearl’ & ‘Vaa’ (335yd/306m per 100g; 100% Superwash Merino)
Shown in size 22in/56cm on model with 23in/58.5cm circumference head

Size & Gauge
To fit size: 20in/50.75cm; use 2.75mm needles
Gauge:
30 sts x 36 rows over Corrugated Rib,
30 sts x 32 rows over Stranded pattern,
28 sts x 36 rows over St.St. to 4in/10cm
Finished sizes:
Circumference: 16.75in/42.5cm
Length: 8.5in/21.5cm

To fit size: 22in/56cm; use 3mm needles
Gauge:
28 sts x 34 rows over Corrugated Rib,
28 sts x 30 rows over Stranded pattern,
26 sts x 34 rows over St.St. to 4in/10cm
Finished sizes:
Circumference: 18in/45.75cm
Length: 9in/22.75cm

Pattern Notes
This pattern is graded by gauge. Slight variations in yarn weight, needle size and/or gauge will be sufficient to change the size; swatching is advised. Points of adjustment are marked on the chart should you wish to make alterations to the depth.

Pattern contents
Written and charted instructions; download links for photographic tutorials

Accessibility Statement
The main PDF for this pattern is colour blind accessible. It uses black text on a white background. Charts are in greyscale and do not rely on colour.

Support
Do you need help with this pattern? We have a specific discussion thread in the Wormhead’s Hats group where you can ask any questions.

Technical Editing: Deb Bramham
ISBN: 978-9916-693-92-6
Copyright Date: 2025
Last Revision: August 2026
File Name: WW469KDiamonde
PDF File Size: 1.69MB; 150dpi