Timex Ironman Essential 10 T5K523SU, 34mm, Grey Dial

Name: Timex Ironman Essential 10, Grey Dial
Brand: Timex
SKU: timex-ironman-essential-10-mid-size
Price: 52.19 GBP
Availability: InStock

By Serdar D.Content updated 23 October 2026

Timex Ironman Essential 10, Grey Dial

The Timex Ironman Essential 10 T5K523SU is a 34.4mm women's digital quartz watch with a grey dial, resin case, and 100m water resistance.

Price

£52.19

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About this item

100-hour chronograph with 10-lap memory and 24-hour countdown timer.
Features customisable alarm, 24-hour military time, dual time zones, and full calendar.
Grey digital display with INDIGLO light-up dial for clear visibility.
Durable 34mm resin case with acrylic lens provides lasting protection.
Adjustable black resin strap ensures a comfortable fit for wrists up to 7.5 inches.

Top Highlights

Brand: Timex
Model Name: Ironman Essential 10 Mid-Size
Model Number: T5K523SU
Department: Women
Item Type: Watch
Manufacturer: Timex
First Available: 17 November 2009
Release Year: 2009

Features & Specs

Display: Digital
Movement Type: Quartz
Power Source: Battery powered
Additional Features: Chronograph, Timer, Alarm, Second Time Zone, Day, Date, Month, Light Up, Water-resistant, Calculator, Stopwatch, Lightweight
Complications: Chronograph, Timer, Alarm, Second time zone, Day, Date, Month, Stopwatch
Battery: Battery powered
Strap Type: Adjustable, Two Piece Strap
Case Material: Resin
Case Size: 34.4 mm
Case Thickness: 10.0 mm
Lug Width: 12.0 mm
Weight: 22.68 g
Water Resistance: 100 m
Sport Type: Running
Strap: Resin
Clasp: Buckle
Closure Type: Buckle
Embellishment: Crystal
Crystal: Acrylic
Dimensions: 17.78 x 10.16 x 10.16 cm; 22.68 g

Style

Style Name: Quartz Watch, Chronograph, Digital
Dial Shape: Round
Dial Colour: Gray
Band Color: Black
Face Style: Linen
Collection: Ironman Essential

Will it fit your wrist?

Best on 15.2–16.2 cm (6.0–6.4 in) wrists

A 34.4 mm women's watch sits just right on these wrists. If your wrist is 16.2–17.2 cm, it looks smaller and more understated. If your wrist is 14.2–15.2 cm, it looks bigger and bolder.

Measure your wrist and see what fits

A rough guide based on case diameter only.

Is this watch big or small?

63% of the women's watches we list are smaller than this one

The most common women's size is 36 mm (103 models). 1 model we list is 34.4 mm.

All our watch size data

Description

The Timex Ironman Essential 10 T5K523SU is a robust digital watch designed for active women, featuring a durable resin case and a comfortable resin strap.

Powered by a reliable quartz movement, this timepiece offers essential functions like a 100-hour chronograph, 10-lap memory, and a 24-hour countdown timer, making it ideal for daily training.

Its grey digital display is enhanced with INDIGLO illumination for clear readability in various lighting conditions. With a 34.4mm case and 100m water resistance, it is well-suited for swimming and everyday wear, providing both functionality and a sporty aesthetic. The watch also includes practical features such as a customisable alarm, dual time zones, and a full calendar.

Frequently Asked Questions

Is the Timex Ironman Essential 10 T5K523SU suitable for swimming and showering?

Yes, the Timex Ironman Essential 10 T5K523SU features 100m water resistance, making it suitable for recreational swimming, showering, and snorkelling. It is not designed for scuba diving.

How does this watch perform for daily sports activities like running?

This Timex Ironman watch is well-suited for daily sports. Its 100-hour chronograph with 10-lap memory and 24-hour countdown timer are built for everyday training and timing precision, making it a reliable companion for running.

What is the battery life of the T5K523SU, and how is it replaced?

The battery life for the Timex Ironman Essential 10 typically lasts several years, depending on usage of features like the INDIGLO light. Battery replacement should be performed by a qualified watch technician to ensure water resistance is maintained.

How does the Ironman Essential 10 compare to other Timex Ironman models?

The Ironman Essential 10 T5K523SU focuses on core training functions in a compact, mid-size design, ideal for women. Other Ironman models might offer more advanced features like GPS or heart rate monitoring, but this model excels in essential digital timing.

Will the 34.4mm case size fit my wrist comfortably?

The 34.4mm resin case and adjustable resin strap are designed for a comfortable fit on women's wrists, accommodating sizes up to 7.5 inches. Its lightweight construction ensures it feels unobtrusive during activities.

Is the digital display readable in bright sunlight?

The grey digital display of the Timex Ironman Essential 10 is generally clear. While direct, harsh sunlight can sometimes cause glare on any digital screen, the INDIGLO light-up dial ensures visibility in low-light conditions.

Editor's take

The Timex Ironman Essential 10 T5K523SU is a purpose-built digital watch, designed specifically for active women who require reliable performance and durability in their daily routines and training. As part of the iconic Ironman collection, it carries a legacy of athletic utility, offering a straightforward and functional approach to timekeeping. Its compact 34.4mm resin case ensures a lightweight feel on the wrist, making it an unobtrusive companion for various activities.

At its core, this timepiece is powered by a precise quartz movement, driving a clear digital display that is easy to read at a glance. The integrated 100-hour chronograph with 10-lap memory and a 24-hour countdown timer provides essential tools for tracking workouts and managing time effectively. Furthermore, the signature INDIGLO illumination ensures excellent visibility in low-light conditions, a crucial feature for early morning runs or evening activities.

While the acrylic crystal and resin construction contribute to its lightweight and impact-resistant nature, they do not offer the scratch resistance of sapphire glass found in more premium sports watches. The 100m water resistance is suitable for swimming and showering, but it is not designed for serious diving, which might be a consideration for dedicated water sports enthusiasts.

Overall, the Timex Ironman Essential 10 T5K523SU is an excellent choice for women seeking a dependable, feature-rich digital watch for fitness and everyday wear. Its blend of practical complications and robust build quality makes it a strong contender against other entry-level digital sports watches, particularly for those who value the Timex Ironman heritage and a comfortable fit.