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Guardian 257 Koolnit Briefs - Hugh McElvanna Menswear
Size Guide

Universal Size Guide

Use our master size charts below to find your perfect fit across our clothing and footwear collections. All measurements are provided as standard industry guidelines.

1. Men's Formal Shirts (Collar Sizing)

Formal dress shirts are measured primarily by the neck circumference.

  • S (Small): Collar 14.5" - 15" (37cm - 38cm) | To Fit Chest 36" - 38"
  • M (Medium): Collar 15.5" - 16" (39cm - 41cm) | To Fit Chest 39" - 41"
  • L (Large): Collar 16.5" - 17" (42cm - 43cm) | To Fit Chest 42" - 44"
  • XL (X-Large): Collar 17.5" - 18" (44cm - 46cm) | To Fit Chest 45" - 47"
  • 2XL (XX-Large): Collar 18.5" - 19" (47cm - 48cm) | To Fit Chest 48" - 50"
  • 3XL (3X-Large): Collar 19.5" - 20" (50cm - 51cm) | To Fit Chest 51" - 53"
  • 4XL (4X-Large): Collar 20.5" - 21" (52cm - 53.5cm) | To Fit Chest 54" - 56"

2. Men's Suit Jackets, Blazers & Waistcoats

Tailored jackets are sized primarily by chest circumference in inches.

  • S (Small / EU 46): To Fit Chest 36" (91.5cm)
  • M (Medium / EU 48): To Fit Chest 38" (96.5cm)
  • L (Large / EU 50): To Fit Chest 40" (101.5cm)
  • XL (X-Large / EU 52): To Fit Chest 42" (106.5cm)
  • 2XL (XX-Large / EU 54): To Fit Chest 44" (111.5cm)
  • 3XL (3X-Large / EU 56): To Fit Chest 46" (117cm)
  • 4XL (4X-Large / EU 58): To Fit Chest 48" (122cm)
  • 5XL (5X-Large / EU 60): To Fit Chest 50" (127cm)
  • 6XL (6X-Large / EU 62): To Fit Chest 52" (132cm)

Jacket Lengths

Most premium tailoring brands offer different jacket lengths based on your height:

  • Short (S): Ideal for heights up to 5'7" (170cm)
  • Regular (R): Ideal for heights from 5'8" to 6'0" (173cm - 183cm)
  • Long (L): Ideal for heights 6'1" and over (185cm+)

2. Men's Pullovers, Knitwear & Casual Shirts

For jumpers, casual shirts, t-shirts, and coats measured by chest size.

  • S (Small): To Fit Chest 36" - 38" (91.5cm - 96.5cm)
  • M (Medium): To Fit Chest 39" - 41" (99cm - 104cm)
  • L (Large): To Fit Chest 42" - 44" (106.5cm - 112cm)
  • XL (X-Large): To Fit Chest 45" - 47" (114.5cm - 119.5cm)
  • 2XL (XX-Large): To Fit Chest 48" - 50" (122cm - 127cm)
  • 3XL (3X-Large): To Fit Chest 51" - 53" (129.5cm - 134.5cm)
  • 4XL (4X-Large): To Fit Chest 54" - 56" (137cm - 142cm)

3. Men's Trousers, Chinos & Jeans

Trouser sizing is determined by your waist circumference and your inside leg length.

Waist Sizing

  • 30" Waist: 76cm (Alpha Size: Small)
  • 32" Waist: 81.5cm (Alpha Size: Medium)
  • 34" Waist: 86.5cm (Alpha Size: Medium - Large)
  • 36" Waist: 91.5cm (Alpha Size: Large)
  • 38" Waist: 96.5cm (Alpha Size: X-Large)
  • 40" Waist: 101.5cm (Alpha Size: XX-Large)
  • 42" Waist: 106.5cm (Alpha Size: 3X-Large)
  • 44" Waist: 111.5cm (Alpha Size: 4X-Large)

Inside Leg Length

  • Short (S): 30" Inside Leg (76cm)
  • Regular (R): 32" Inside Leg (81.5cm)
  • Long (L): 34" Inside Leg (86.5cm)

4. Women's Blouses & Tops

Standard conversions for women's tops and tailored items.

  • UK 8 (XS): To Fit Bust 32" (81cm)
  • UK 10 (S): To Fit Bust 34" (86cm)
  • UK 12 (M): To Fit Bust 36" (91cm)
  • UK 14 (L): To Fit Bust 38" (97cm)
  • UK 16 (XL): To Fit Bust 40" (102cm)
  • UK 18 (2XL): To Fit Bust 42" (107cm)
  • UK 20 (3XL): To Fit Bust 44" (112cm)

5. Women's Skirts & Trousers

Sizing guidelines for waist and hip fits.

  • UK 8: Waist 25" (63.5cm) | Hips 35" (89cm)
  • UK 10: Waist 27" (68.5cm) | Hips 37" (94cm)
  • UK 12: Waist 29" (73.5cm) | Hips 39" (99cm)
  • UK 14: Waist 31" (78.5cm) | Hips 41" (104cm)
  • UK 16: Waist 33" (84cm) | Hips 43" (109cm)
  • UK 18: Waist 36" (91.5cm) | Hips 46" (117cm)
  • UK 20: Waist 39" (99cm) | Hips 49" (124.5cm)

6. Footwear Size Guide

Shoe sizes can vary slightly by brand, but these charts show standard conversions.

Men's Shoes

  • UK 6: EU 39-40 | US 7 | Foot Length approx. 24.5cm
  • UK 7: EU 41 | US 8 | Foot Length approx. 25.4cm
  • UK 8: EU 42 | US 9 | Foot Length approx. 26.3cm
  • UK 9: EU 43 | US 10 | Foot Length approx. 27.2cm
  • UK 10: EU 44-44.5 | US 11 | Foot Length approx. 28.0cm
  • UK 11: EU 45-46 | US 12 | Foot Length approx. 28.8cm
  • UK 12: EU 47 | US 13 | Foot Length approx. 29.6cm

Guardian 257 Koolnit Briefs - Airtex Cellular Mesh Fabric

$13.00

Guardian 257 Koolnit Briefs – step into superior everyday freshness with these classic men's briefs. Engineered specifically to tackle warmer weather, these undergarments offer a comfortable, supportive fit designed for the modern gentleman who prioritises physical ease.

Crafted from premium airtex cellular mesh fabric, this design maximizes natural ventilation to keep you feeling cool, fresh, and confident throughout hot summer days or active routines. The open-knit construction continuously promotes airflow right against the skin.

Featuring a soft, elasticated waistband and gentle leg openings, these briefs provide secure, non-binding support without causing friction or restriction. A practical crossover Y-front fly finish adds reliable convenience for daily wear.

Built for long-lasting durability and easy care, the Guardian 257 Koolnit Briefs maintain their comfortable stretch and crisp shape through frequent washing. They serve as an essential foundation piece for any gentleman's underwear collection.

Key Product Specifications

  • Official Style Identification: Designated under the signature Guardian collection as Style No. 257.
  • Breathable Airtex Fabric: Built with lightweight cellular mesh fabric ideal for warmer weather and tropical travel.
  • Classic Y-Front Design: Features a traditional functional fly design for maximum daily practicality and convenience.
  • Comfort Waistband: Outfitted with a gentle elasticated band that sits securely without digging into the waist.
  • Soft Leg Binding: Finished with smooth elasticated leg trims to prevent rubbing and chafing.
  • County Armagh Heritage: Supplied by Hugh McElvanna Menswear, proudly outfitting local gentlemen since 1968.

Practical Daily Styling Advice

The lightweight airtex construction of these white briefs makes them an ideal choice under summer clothing. Pair them under light cotton chinos, casual linen trousers, or summer shorts for maximum breathability during hot weather, keeping you fresh and comfortable all day long.