Gelert Size Guide
Gelert is a trusted British outdoor and activewear brand known for producing high-quality clothing and footwear designed for outdoor enthusiasts, hikers, and everyday adventurers. With a heritage rooted in durability and functionality, Gelert specialises in weather-resistant clothing, technical layers, and performance gear suitable for both men and women. The brand's sizing philosophy emphasises comfort and freedom of movement, particularly in their technical ranges designed for outdoor activities. Gelert garments are engineered to accommodate layering, which is essential for outdoor pursuits, and their fits are generally true to size with a focus on practical, unrestricted movement. Whether you're seeking casual outdoor wear or technical performance gear, Gelert offers a comprehensive range of sizes from children's ranges through to XXL for adults, ensuring that adventurers of all shapes and sizes can find appropriate clothing.
How to Measure
To ensure you select the correct size, follow these simple measurement steps using a soft measuring tape. Wear minimal clothing and stand in a natural, relaxed posture whilst someone assists you with measurements, or use a mirror to help guide the tape placement.
- Chest Measurement: Wear just an undergarment or nothing at all. Stand up straight with your arms hanging naturally by your sides and breathe normally. Run a soft tape measure under your armpits over the largest part of your chest and across your shoulder blades. The tape measure should sit snugly but not be pulled tight.
- Waist Measurement: Measure around your natural waist (typically the narrowest point around your middle). Keep the tape measure parallel to the ground and ensure it's not too tight or too loose—you should be able to fit one finger comfortably between the tape and your body.
- Hip Measurement: Measure around the fullest part of your hips and bottom, keeping the tape measure horizontal. This measurement is particularly important for women's trousers and overtrousers.
- Arm Length: Ask a friend to run a soft tape measure from the centre of the back of your neck, across to the tip of one shoulder, then down the outside of your arm to your wrist bone. Alternatively, measure from your shoulder point down to your wrist whilst your arm is relaxed at your side.
- Trouser Length: For trousers, measure from your natural waist down the inside of your leg to your ankle bone. Gelert offers multiple inseam lengths including Short (29”/73.5cm), Regular (31”/79cm), and Long (33”/84cm) options for both men and women.
- Sock Size: If purchasing socks, note your UK shoe size, as Gelert sock sizing corresponds directly to footwear sizing with Small, Medium, and Large categories.
Women's Clothing Size Chart
Women's Tops
| UK Size |
EU Size |
Chest (inches) |
Chest (cm) |
| 8 |
36 |
32–36" |
81–86cm |
| 10 |
38 |
34–36" |
86–91cm |
| 12 |
40 |
36–38" |
91–96cm |
| 14 |
42 |
38–40" |
96–101cm |
| 16 |
44 |
40–42" |
101–106cm |
| 18 |
46 |
42–44" |
106–112cm |
| 20 |
48 |
44–46" |
112–117cm |
Women's Overtrousers & Trousers
| UK Size |
EU Size |
Waist (inches) |
Waist (cm) |
| 8 |
34 |
23–24" |
58–62cm |
| 10 |
36 |
25–26" |
63–67cm |
| 12 |
38 |
27–28" |
68–72cm |
| 14 |
40 |
29–30" |
73–77cm |
| 16 |
42 |
31–32" |
78–82cm |
| 18 |
44 |
33–34" |
83–87cm |
| 20 |
46 |
35–36" |
88–92cm |
Women's Leg Lengths
| Length Category |
Length (inches) |
Length (cm) |
Available in UK Sizes |
| Short |
29" |
73.5cm |
All sizes 8–20 |
| Regular |
31" |
79cm |
All sizes 8–20 |
| Long |
33" |
84cm |
Sizes 10–16 only |
Women's Socks
| Size |
UK Shoe Size |
EU Shoe Size |
| Small |
3–4.5 |
35–37 |
| Medium |
5–6.5 |
38–40 |
| Large |
7–8.5 |
41–43 |
Men's Clothing Size Chart
Men's Tops
| UK Size |
EU Size |
Chest (inches) |
Chest (cm) |
| XS |
46 |
32–34" |
81–86cm |
| S |
48 |
35–37" |
89–94cm |
| M |
50 |
38–40" |
96–101cm |
| L |
52 |
41–43" |
104–109cm |
| XL |
54 |
44–46" |
112–117cm |
| XXL |
56 |
47–49" |
119–124cm |
Men's Overtrousers & Trousers
| UK Size |
EU Size |
Waist (inches) |
Waist (cm) |
| XS |
44–46 |
28–30" |
71–76cm |
| S |
46–48 |
30–32" |
76–81cm |
| M |
48–50 |
32–34" |
81–86cm |
| L |
52–54 |
34–36" |
86–91cm |
| XL |
56–58 |
38–40" |
96–101cm |
| XXL |
58–60 |
42–44" |
106–112cm |
Men's Trouser Lengths
| Length Category |
Inseam (inches) |
EU Size |
Inseam (cm) |
| Short |
29" |
– |
73.5cm |
| Regular |
31" |
– |
79cm |
| Long |
33" |
– |
84cm |
Men's Socks
| Size |
UK Shoe Size |
EU Shoe Size |
| Small |
3–5.5 |
36–39 |
| Medium |
6–8.5 |
40–43 |
| Large |
9–12 |
44–47 |
Kids' & Toddlers' Clothing Size Chart
Kids' Sizes (Ages 3–14)
| UK Size |
EU Size |
Height (inches) |
Height (cm) |
Approx. Age |
| 3–4 |
104 |
41" |
104cm |
3–4 years |
| 5–6 |
116 |
46" |
116cm |
5–6 years |
| 7–8 |
128 |
50" |
128cm |
7–8 years |
| 9–10 |
140 |
55" |
140cm |
9–10 years |
| 11–12 |
152 |
60" |
152cm |
11–12 years |
| 13–14 |
164 |
64" |
164cm |
13–14 years |
Toddlers' Sizes (Ages 6 months–3 years)
| UK Size |
EU Size |
Height (inches) |
Height (cm) |
Approx. Age |
| 6–12 months |
68–80 |
27–31" |
68–80cm |
6–12 months |
| 12–18 months |
80–86 |
31–34" |
80–86cm |
12–18 months |
| 18–24 months |
86–92 |
34–36" |
86–92cm |
18–24 months |
| 24–36 months |
92–98 |
36–38" |
92–98cm |
24–36 months |
| 36–48 months |
98–104 |
38–41" |
98–104cm |
36–48 months |
Kids' Socks
| Size |
UK Shoe Size |
EU Shoe Size |
| Small |
10–12 |
28–30 |
| Medium |
12–14 |
31–33 |
| Large |
14–16 |
34–36 |
Men's Mid-Layer Size Chart
Men's Mid-Layer & Base Layer Tops
Gelert's men's mid-layer ranges provide essential temperature regulation for outdoor activities. These layers are designed with a fitted cut to work effectively under heavier jackets whilst still allowing freedom of movement.
| Size |
Chest (cm) |
Chest (approx. inches) |
| XS |
86cm |
34" |
| S |
91cm |
36" |
| M |
97–102cm |
38–40" |
| L |
107–112cm |
42–44" |
| XL |
117–122cm |
46–48" |
| XXL |
127–132cm |
50–52" |
| 3XL |
137–142cm |
54–56" |
Product-Specific Sizing Guidance
Outdoor Jackets & Overtrousers: Gelert's outdoor jackets and salopettes are designed with layering in mind. When selecting your size, consider that you may be wearing thermal base layers and mid-layers underneath. If you're between sizes, opt for the larger size to accommodate your layering system comfortably. The chest measurements provided are for the garment itself; allow approximately 2–4 inches (5–10cm) of ease over your actual chest measurement for comfortable layering.
Overtrousers & Salopettes: These high-visibility and weather-resistant trousers are engineered to fit over regular trousers or leggings. Measure your overtrousers against the waist column provided, and ensure adequate length for your inseam. Gelert typically stocks Short, Regular, and Long lengths to accommodate different leg proportions, though the Long option is not available in all sizes.
Base Layers & Mid-Layers: Technical base layers and mid-layers from Gelert are designed with a closer fit to maximise thermal efficiency and reduce bulk. These should fit snugly against the skin but allow movement at the shoulders and joints. If you prefer a looser fit for freedom of movement, consider sizing up.
Socks: Gelert socks are designed to work with hiking boots and outdoor footwear. Sock sizing is directly linked to your UK shoe size; choose the size bracket that corresponds to your footwear size. Merino wool and technical sock blends provide superior moisture-wicking and cushioning for extended outdoor pursuits.
Sizing Tips
- Account for Layering: Gelert garments, particularly jackets and overtrousers, are designed for outdoor layering. Always allow extra room for base layers and mid-layers. A snug fit over bare skin is not ideal for active outdoor use; aim for a fit that accommodates at least one thermal layer underneath.
- Check Inseam Lengths: Gelert offers Short (29”), Regular (31”), and Long (33”) inseam options for trousers. Measure your inseam accurately from your natural waist down the inside of your leg to your ankle bone. Incorrect trouser length can lead to discomfort during outdoor activities and reduce the waterproofing effectiveness at the ankles.
- Chest Rather Than Waist: When selecting tops and mid-layers, prioritise chest measurements over waist measurements. Gelert tops are cut with an emphasis on chest and shoulder width to accommodate your arms during movement. Waist definition is secondary to shoulder freedom in these technical ranges.
- Measure Over Your Regular Clothing: For overtrousers and salopettes, measure your waist whilst wearing the exact trousers or leggings you'll be layering underneath. This ensures optimal fit and prevents bunching or gaps at the waist. Many outdoor enthusiasts find they need a size larger in overtrousers than in regular trousers.
- Women's Sizing and Hip Accommodation: Women's Gelert trousers and overtrousers come in defined waist sizes (8–20 UK). Pay attention to both waist and the flexibility of the fabric; technical outdoor fabrics often stretch slightly, allowing for a comfortable fit across hips and thighs. If you're between sizes, choose based on your waist measurement first, as the fabric stretch will accommodate minor hip variations.
- Children's Growth Room: When purchasing Gelert children's and toddler clothing, allow room for growth if the child is at the younger end of the age range. However, avoid excessive room for layering, as children's technical wear is typically more fitted. Consider purchasing socks and accessories that can adapt to growth more readily than jackets.
- Verify Sale Items: Gelert occasionally offers sizing guides on their official Help Centre. If you're unsure about a specific product, check the detailed product page for any item-specific sizing notes, as some styles may fit differently than the standard size chart.
- Return Policy: Gelert offers a straightforward returns policy, allowing you to purchase both sizes if genuinely uncertain and return the unsuitable size. This is often more practical than extensive deliberation, particularly when ordering online without trying items on first.
Note: This size guide is based on Gelert's official sizing standards and typical conversions. Whilst measurements are accurate to the best of our knowledge, we recommend checking the specific product page for any item-specific sizing notes. If you have any concerns about fit, contact Gelert's customer service team or consult the official Gelert Help Centre for further
