mens-herringbone-flat-cap-alderney
mens-herringbone-flat-cap-alderney
mens-herringbone-flat-cap-alderney
mens-herringbone-flat-cap-alderney
mens-herringbone-flat-cap-alderney
mens-herringbone-flat-cap-alderney
mens-herringbone-flat-cap-alderney
mens-herringbone-flat-cap-alderney
mens-herringbone-flat-cap-alderney
mens-herringbone-flat-cap-alderney
mens-herringbone-flat-cap-alderney

Men's Herringbone Flat Cap | The Alderney

£22.99
Colour:Brown
Size:One Size (adjustable)
Fit
Last few units in stock
United Kingdom

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NOTICE: This product is one of our bestsellers and sold out last week.
If the “Add to Bag” button still works, it means the product is still in stock online in limited quantities.
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Size Guide

Select your product type

Tops, Knitwear & Shirts ▼

Kensington · Belgravia · Bath · Brighton · Oxford · Lomond & similar

Size Chest (cm) Waist (cm) Shoulder (cm) Sleeve (cm) Length (cm)
S 88 – 97 78 – 86 43 – 45 59 – 62 68 – 72
M 98 – 104 84 – 91 44 – 47 60 – 64 70 – 74
L 103 – 110 91 – 98 46 – 49 61 – 66 72 – 76
XL 109 – 120 97 – 104 48 – 51 62 – 67 74 – 78
2XL 111 – 131 102 – 109 50 – 53 63 – 68 76 – 80

How to measure

Measurement Where to measure
Chest Around the fullest part of your chest, tape horizontal under the arms
Waist Around your natural waist, 1–2 cm above the navel, relaxed
Shoulder Across the back, from shoulder seam to shoulder seam
Sleeve From the shoulder seam to the wrist bone, arm slightly bent
FitTailored — true to size
CareCold gentle wash. Dry flat.
Tolerance1–3 cm variance is within normal range
Trousers ▼

Cavendish · St Ives · Greenwich · Southwark · Cardiff & similar

Size Waist (cm) Hip (cm) Length (cm) Inseam (cm)
S 71 – 79 96 – 108 95 – 102 72 – 76
M 75 – 86 99 – 112 99 – 107 73 – 78
L 79 – 93 105 – 117 101 – 110 74 – 79
XL 83 – 98 108 – 122 102 – 112 75 – 80
2XL 87 – 104 114 – 127 103 – 116 76 – 80

How to measure

Measurement Where to measure
Waist Around your natural waist, 1–2 cm above the navel, relaxed
Hip Around the fullest part of your hips and seat
Length From the waistband to the hem, along the outer leg
Inseam From the crotch seam to the ankle bone, along the inner leg
FitTailored — size up if between sizes
CareCold gentle wash. Hang to dry.
Tolerance1–3 cm variance is within normal range
Blazers ▼
Size Chest (cm) Shoulder (cm) Sleeve (cm) Back length (cm)
S 96 – 104 43 – 46 59 – 63 65 – 72
M 100 – 109 44 – 47 60 – 64 67 – 73
L 104 – 114 46 – 49 61 – 65 69 – 75
XL 108 – 119 47 – 51 62 – 66 71 – 76
2XL 112 – 124 49 – 52 63 – 67 73 – 78

How to measure

Measurement Where to measure
Chest Around the fullest part of your chest, tape horizontal under the arms
Shoulder Across the back, from shoulder seam to shoulder seam
Sleeve From the shoulder seam to the wrist bone, arm slightly bent
Back length From the base of the collar seam to the hem, down the centre back
FitTailored — size up if between sizes
CareDry clean recommended
Tolerance1–3 cm variance is within normal range
Coats & Jackets ▼

Cambridge · Chester · Westminster · Barbican · Leeds & similar

Size Chest (cm) Shoulder (cm) Sleeve (cm) Length (cm)
S 90 – 106 43 – 45 60 – 62 64 – 100
M 95 – 110 44 – 47 61 – 64 66 – 103
L 101 – 114 46 – 49 63 – 65 68 – 106
XL 107 – 118 48 – 51 64 – 66 70 – 109
2XL 113 – 122 50 – 52 65 – 67 71 – 112

How to measure

Measurement Where to measure
Chest Around the fullest part of your chest, over a light layer
Shoulder Across the back, from shoulder seam to shoulder seam
Sleeve From the shoulder seam to the wrist bone, arm slightly bent
Length From the highest point of the shoulder to the hem
FitRelaxed — size up if layering heavily
CareDry clean or cold gentle wash
Tolerance1–3 cm variance is within normal range
Sets ▼

Bloomsbury Safari · Bournemouth · Brixton & similar

Size Chest (cm) Waist (cm) Hip (cm)
S 99 – 112 70 – 91 98 – 108
M 104 – 116 74 – 97 104 – 112
L 112 – 121 78 – 103 108 – 117
XL 117 – 126 82 – 109 113 – 122
2XL 121 – 131 86 – 116 117 – 127

How to measure

Measurement Where to measure
Chest Around the fullest part of your chest, tape horizontal under the arms
Waist Around your natural waist, 1–2 cm above the navel, relaxed
Hip Around the fullest part of your hips and seat
FitRelaxed — true to size
CareCold gentle wash. Hang to dry.
Tolerance1–3 cm variance is within normal range
Shoes, Sandals & Loafers ▼
UK EU Foot length (cm) Foot length (in)
6 39 24.8 9.8
6.5 40 25.2 9.9
7 41 25.7 10.1
7.5 41.5 26.0 10.2
8 42 26.5 10.4
8.5 42.5 26.8 10.6
9 43 27.3 10.7
9.5 44 27.8 10.9
10 44.5 28.2 11.1
10.5 45 28.6 11.3
11 46 29.2 11.5
12 47 30.0 11.8
13 48 30.8 12.1

How to measure

Measurement Where to measure
Foot length Stand on paper with your heel against a wall, mark your longest toe and measure the distance
Which foot Measure both and use the larger one — most feet differ slightly
When Measure in the evening, when your feet are at their fullest
FitTrue to size — size up if between
CareWipe clean with a dry cloth
NoteFoot length is the reliable figure. UK and EU conversions vary between makers

Size Guide

Select your product type

Tops, Knitwear & Shirts ▼

Kensington · Belgravia · Bath · Brighton · Oxford · Lomond & similar

Size Chest (cm) Waist (cm) Shoulder (cm) Sleeve (cm) Length (cm)
S 88 – 97 78 – 86 43 – 45 59 – 62 68 – 72
M 98 – 104 84 – 91 44 – 47 60 – 64 70 – 74
L 103 – 110 91 – 98 46 – 49 61 – 66 72 – 76
XL 109 – 120 97 – 104 48 – 51 62 – 67 74 – 78
2XL 111 – 131 102 – 109 50 – 53 63 – 68 76 – 80

How to measure

Measurement Where to measure
Chest Around the fullest part of your chest, tape horizontal under the arms
Waist Around your natural waist, 1–2 cm above the navel, relaxed
Shoulder Across the back, from shoulder seam to shoulder seam
Sleeve From the shoulder seam to the wrist bone, arm slightly bent
FitTailored — true to size
CareCold gentle wash. Dry flat.
Tolerance1–3 cm variance is within normal range
Trousers ▼

Cavendish · St Ives · Greenwich · Southwark · Cardiff & similar

Size Waist (cm) Hip (cm) Length (cm) Inseam (cm)
S 71 – 79 96 – 108 95 – 102 72 – 76
M 75 – 86 99 – 112 99 – 107 73 – 78
L 79 – 93 105 – 117 101 – 110 74 – 79
XL 83 – 98 108 – 122 102 – 112 75 – 80
2XL 87 – 104 114 – 127 103 – 116 76 – 80

How to measure

Measurement Where to measure
Waist Around your natural waist, 1–2 cm above the navel, relaxed
Hip Around the fullest part of your hips and seat
Length From the waistband to the hem, along the outer leg
Inseam From the crotch seam to the ankle bone, along the inner leg
FitTailored — size up if between sizes
CareCold gentle wash. Hang to dry.
Tolerance1–3 cm variance is within normal range
Blazers ▼
Size Chest (cm) Shoulder (cm) Sleeve (cm) Back length (cm)
S 96 – 104 43 – 46 59 – 63 65 – 72
M 100 – 109 44 – 47 60 – 64 67 – 73
L 104 – 114 46 – 49 61 – 65 69 – 75
XL 108 – 119 47 – 51 62 – 66 71 – 76
2XL 112 – 124 49 – 52 63 – 67 73 – 78

How to measure

Measurement Where to measure
Chest Around the fullest part of your chest, tape horizontal under the arms
Shoulder Across the back, from shoulder seam to shoulder seam
Sleeve From the shoulder seam to the wrist bone, arm slightly bent
Back length From the base of the collar seam to the hem, down the centre back
FitTailored — size up if between sizes
CareDry clean recommended
Tolerance1–3 cm variance is within normal range
Coats & Jackets ▼

Cambridge · Chester · Westminster · Barbican · Leeds & similar

Size Chest (cm) Shoulder (cm) Sleeve (cm) Length (cm)
S 90 – 106 43 – 45 60 – 62 64 – 100
M 95 – 110 44 – 47 61 – 64 66 – 103
L 101 – 114 46 – 49 63 – 65 68 – 106
XL 107 – 118 48 – 51 64 – 66 70 – 109
2XL 113 – 122 50 – 52 65 – 67 71 – 112

How to measure

Measurement Where to measure
Chest Around the fullest part of your chest, over a light layer
Shoulder Across the back, from shoulder seam to shoulder seam
Sleeve From the shoulder seam to the wrist bone, arm slightly bent
Length From the highest point of the shoulder to the hem
FitRelaxed — size up if layering heavily
CareDry clean or cold gentle wash
Tolerance1–3 cm variance is within normal range
Sets ▼

Bloomsbury Safari · Bournemouth · Brixton & similar

Size Chest (cm) Waist (cm) Hip (cm)
S 99 – 112 70 – 91 98 – 108
M 104 – 116 74 – 97 104 – 112
L 112 – 121 78 – 103 108 – 117
XL 117 – 126 82 – 109 113 – 122
2XL 121 – 131 86 – 116 117 – 127

How to measure

Measurement Where to measure
Chest Around the fullest part of your chest, tape horizontal under the arms
Waist Around your natural waist, 1–2 cm above the navel, relaxed
Hip Around the fullest part of your hips and seat
FitRelaxed — true to size
CareCold gentle wash. Hang to dry.
Tolerance1–3 cm variance is within normal range
Shoes, Sandals & Loafers ▼
UK EU Foot length (cm) Foot length (in)
6 39 24.8 9.8
6.5 40 25.2 9.9
7 41 25.7 10.1
7.5 41.5 26.0 10.2
8 42 26.5 10.4
8.5 42.5 26.8 10.6
9 43 27.3 10.7
9.5 44 27.8 10.9
10 44.5 28.2 11.1
10.5 45 28.6 11.3
11 46 29.2 11.5
12 47 30.0 11.8
13 48 30.8 12.1

How to measure

Measurement Where to measure
Foot length Stand on paper with your heel against a wall, mark your longest toe and measure the distance
Which foot Measure both and use the larger one — most feet differ slightly
When Measure in the evening, when your feet are at their fullest
FitTrue to size — size up if between
CareWipe clean with a dry cloth
NoteFoot length is the reliable figure. UK and EU conversions vary between makers

The Alderney is a flat cap built on a tight herringbone weave, giving it structure without any stiffness across the crown. A woven back strap with a metal buckle sits just above the nape, letting you dial in the fit rather than settle for one. Reach for it on a bright weekend walk, at a summer market, or anywhere a baseball cap would feel too casual and a panama too formal.

  • Airy Against the Scalp: The open herringbone weave lets air move through the crown, so it never feels close or heavy on a warm afternoon.
  • Adjustable Buckle Strap: A woven strap with a metal buckle sits at the back, so the fit is yours to set rather than fixed at one size.
  • Styling: Wear it with an open-collar linen shirt and chinos for a lunch outdoors, or with a plain tee and dark denim for a market morning.
  • Fit and Sizing: The Alderney is cut to Altheny's own sizing with a generous internal circumference; the back strap gives extra room, so if you're between sizes, take the smaller one.
  • Weave and Care: The tightly woven herringbone shell keeps its shape through a day outdoors; spot clean with a damp cloth and leave to air dry away from direct heat.

Styled by Altheny

Some pieces styled by our community.

We stand by what we make.

Every order carries a 30-day money-back guarantee

From the day it arrives. If the fit is wrong, send it back.

FAQ

Delivery & Orders

We offer Free Tracked Delivery over £70 across all the UK!
All orders are processed within 24 to 72 business hours.

Standard delivery typically takes between 6 to 9 working days, depending on your region.

Delivery details will be provided during checkout & in your confirmation email.

Once your order has shipped, you’ll receive an email with your tracking link.
You can also track it anytime via our Order Tracking page.

We recommend choosing your usual size.
If you're between sizes, we suggest going one size up.
You can also check our Size Guide available on every product page.

No worries! We offer one free size exchange thanks to our 
Perfect Fit Guarantee.

Payment & Security

Yes. All transactions are encrypted and protectedusing a secure SSL connection.

Please contact us as soon as possible after placing your order.
If your order hasn’t shipped yet, we’ll do our best to assist you.

You can reach us at any time via our Contact page or by email at contact@altheny.co.uk
We usually reply within 24 hours (Monday to Friday)