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Garmin Forerunner 165 GPS Running Smartwatch

Garmin Forerunner 165 GPS Running Smartwatch

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£153.92
£153.92 £153.92
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    Garmin Forerunner 165 GPS Running Smartwatch

    Black / Standard

    UK Size EU Size US Size Chest (cm) Chest (in) Waist (cm) Waist (in) Hip (cm) Hip (in)
    6 34 2 79-83 31-32.5 61-65 24-25.5 86-90 34-35.5
    8 36 4 84-88 33-34.5 66-70 26-27.5 91-95 36-37.5
    10 38 6 89-93 35-36.5 71-75 28-29.5 96-100 38-39.5
    12 40 8 94-98 37-38.5 76-80 30-31.5 101-105 40-41.5
    14 42 10 99-104 39-41 81-86 32-34 106-111 42-43.5
    16 44 12 105-110 41.5-43.5 87-92 34.5-36 112-117 44-46
    UK Size EU Size US Size Waist (cm) Waist (in) Hip (cm) Hip (in)
    6 34 2 61-65 24-25.5 86-90 34-35.5
    8 36 4 66-70 26-27.5 91-95 36-37.5
    10 38 6 71-75 28-29.5 96-100 38-39.5
    12 40 8 76-80 30-31.5 101-105 40-41.5
    14 42 10 81-86 32-34 106-111 42-43.5
    16 44 12 87-92 34.5-36 112-117 44-46
    UK Size EU Size US Size Chest (cm) Chest (in) Waist (cm) Waist (in) Hip (cm) Hip (in)
    6 34 2 79-83 31-32.5 61-65 24-25.5 86-90 34-35.5
    8 36 4 84-88 33-34.5 66-70 26-27.5 91-95 36-37.5
    10 38 6 89-93 35-36.5 71-75 28-29.5 96-100 38-39.5
    12 40 8 94-98 37-38.5 76-80 30-31.5 101-105 40-41.5
    14 42 10 99-104 39-41 81-86 32-34 106-111 42-43.5
    16 44 12 105-110 41.5-43.5 87-92 34.5-36 112-117 44-46
    Size Chest (inches) Underbust (inches)
    XS 33⅛ 27½
    S 34⅝ 29⅛
    M 36¼ 30¾
    L 39⅜ 33½
    XL 42½ 36¼
    2XL 45⅝ 39
    3XL 48⅞ 41¾
    UK Size EU Size US Size Chest (cm) Chest (in) Waist (cm) Waist (in)
    XS 44 34 86-91 34-36 71-76 28-30
    S 46 36 91-97 36-38 76-81 30-32
    M 48 38 97-102 38-40 81-86 32-34
    L 50 40 102-107 40-42 86-91 34-36
    XL 52 42 107-112 42-44 91-97 36-38
    2XL 54 44 112-117 44-46 97-102 38-40
    UK Size EU Size US Size Waist (cm) Waist (in) Hip (cm) Hip (in)
    XS 44 34 71-76 28-30 86-91 34-36
    S 46 36 76-81 30-32 91-97 36-38
    M 48 38 81-86 32-34 97-102 38-40
    L 50 40 86-91 34-36 102-107 40-42
    XL 52 42 91-97 36-38 107-112 42-44
    2XL 54 44 97-102 38-40 112-117 44-46
    EU Size UK Size US Size
    35 2.5 5
    36 3.5 6
    37 4 6.5
    38 5 7.5
    39 6 8.5
    40 6.5 9
    41 7.5 10
    EU Size UK Size US Size
    35 2.5 5
    36 3.5 6
    37 4 6.5
    38 5 7.5
    39 6 8.5
    40 6.5 9
    41 7.5 10
    How to measure: For the most accurate fit, measure yourself in your underwear. Use a soft measuring tape and keep it snug but not tight. For chest measurements, measure around the fullest part of your bust. For waist, measure around the narrowest part. For hips, measure around the fullest part. For sports bras, measure your underbust directly under your bust where the band sits.

    Build better runs with the Garmin Forerunner 165, a lightweight 43 mm GPS smartwatch designed to make training clear and motivating. Its bright AMOLED touchscreen, reliable pace tracking and personalised coaching help you understand every session without overcomplicating the process.

    Why you'll love it

    • Accurate run tracking: Built-in GPS records pace and distance, while wrist-based heart rate adds useful effort insights.
    • Personalised daily workouts: Suggested sessions adapt to your performance and recovery, helping each run fit the bigger picture.
    • Train for a goal: Garmin Coach and race-adaptive plans provide workout suggestions tailored to supported events.
    • Understand the impact: Training Effect shows the primary benefit of each workout, while recovery time estimates when you're ready for another hard effort.
    • Start informed: Morning Report brings together sleep, recovery, training outlook, weather and HRV status.
    • More ways to move: Choose from over 25 built-in profiles, including running, cycling, HIIT and strength.
    • Safety support: Incident Detection can share your live location with emergency contacts during selected outdoor activities when paired with a compatible smartphone.

    Key specifications

    • 43 mm lightweight case
    • 1.2-inch AMOLED touchscreen with button controls
    • Built-in GPS
    • Up to 11 days of listed battery life in smartwatch mode
    • Up to 19 hours of listed battery life in GPS mode
    • Bluetooth connectivity and smart notifications
    • Garmin Pay support with compatible banks and networks
    • Standard and Music versions available

    Whether you're building consistency, chasing a personal best or learning how to recover properly, the Forerunner 165 keeps the next useful insight right on your wrist.

    Health and activity data provides estimates only. Safety, payment, notification and music features depend on the selected version, paired device, region, bank, network and service support. Battery life varies with use.

    Frequently Asked Questions

    Find answers to common questions about our products

    • Our products are crafted from premium, moisture-wicking fabrics designed for maximum performance and comfort during your workouts.

    • Please refer to our detailed size guide available on each product page. We recommend measuring yourself and comparing to our size chart for the best fit.

    • We offer a 30-day return policy on all unworn items with tags attached. Please visit our returns page for full details.

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