Toni & Guy TGST2989UK Slim Definer Straighteners

Product information

The Slim Definer Straighteners by Toni & Guy are a professional styling tool, Salon tested and innovatively designed to help you create the look you want and express your personal style.

Perfect for male & females this ultra slim 15mm straightener creates definition where needed and straightens the shortest of Pixie Crops. The narrow plates ensure this straightener is versatile enough to be the ultimate unisex styling tool.

Designed to protect your hair & colour with Ceramic Tourmaline plates, its unique Colour Lock Technology is developed to enhance shine, smooth hair follicles and lock in colour as you style. This Slim Definer heats up in seconds with variable temperature control and a maximum temperature of 200°C, to suit all hair types.

Toni & Guy Salon Tested Professional Performance is guaranteed, with a 3m salon length cord for ultimate styling freedom and 2-year warranty. For effortless, laid-back, lived in styles.

Toni & Guy
Cable length
Eligible for International Delivery
Model name / number


Click & collect

Free Click & collect from John Lewis or Waitrose shops for collection tomorrow from 2pm
340 participating John Lewis and Waitrose shops

Standard delivery


Next or named day delivery


Next or named morning delivery


Collect+ from a local shop from tomorrow - postcode exclusions apply for Collect+ deliveries

5000+ participating Collect+ shops

International delivery not available


We want you to be happy with your purchase. If you're not, just return the products to us or to one of our shops. Unless faulty, we'd like this to be within 90 days of purchase. Exceptions apply to certain products - find out more about our refund policy.

Depending on the type of product, you can make free returns via our shops, Royal Mail (or courier collection for large or heavy items), Collect+ or via MyHermes.

Find out more about returning products

Q & As


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Additional services

  • 2 year guarantee included

More than 10 in stock