Syns in A Sandwich Thin: Complete Slimming World Guide

Updated on 
9 March, 2026

Are Sandwich Thins High In Syns On Slimming World?

Sandwich thins are an excellent food for making diet-friendly lunches with, these thins reduce the calories from your average bread slice thanks to their thin size while you still get to enjoy your sandwich.

Sandwich thins are on average around 5 syns per thin however this can vary from brand to brand, this makes them a great choice for reducing syns from normal bread, but only by around 1 syns.

Down below in our guide we will cover why sandwich thins are so low in syns, how they compare to your standard bread, whether or not bread thins count as your healthy extra B, syn values as well as some low syn filling ideas.

Why Are Sandwich Thins So Low In Syns?

At just 5 syns a thin, sandwich thins get their low syns from their lower calories, which is thanks to their thinner size. You could eat up to three thins before using up your daily syn allowance for the day making them an excellent alternative to bread.

To keep your sandwich thins low in syns you can use low syn fillings or syn free foods as a healthy lunch.

How Do Sandwich Thins Compare To Normal Bread?

Although sandwich thins are popular in the dieting world, their syns unfortunately do not differ much from your average bread slice.

For example, two slices of 400g bread are 3 syns each, so 6 syns in total, meaning you only shave off one syns by using a sandwich thin. You should also note that regular wholemeal bread counts as your healthy extra B fibre allowance, making them syn free up to 400g.

We've listed some syn values of regular bread down below to help you compare.

  • White bread 400g slice - 3 syns.
  • White bread 800g medium slice - 4.5 syns per slice.
  • Wholemeal bread 400g - 3 syns or healthy extra B.
  • Wholemeal bread 800g - 4.5 syns or healthy extra B.

Do Sandwich Thins Count Towards Your Healthy Extra B?

Since sandwich thins are healthy, you might be wondering if they could count towards your healthy extra B fibre allowance? Well, regular white bread thins do not count, but wholemeal sandwich thins do such as the wholemeal ones from Kingsmill.

We've listed out some other healthy extra Bs below to help you out.

  • Rye bread - 60 g. 
  • Wholemeal pitta bread - 60 g. 
  • Two slices of multiseed bread/gluten-free bread - 60 g 
  • One Warburtons gluten-free multiseed sandwich thin. 
  • Wholemeal bread loaf slice (thick). 
  • Wholemeal roll - 60 g. 
  • One Weight Watchers tortilla wrap.

Syn Values Of Sandwich Thins

As we mentioned above, the average syn value of sandwich thins are 5 syns but they can vary according to different brands and add-ins, so to keep you on track, we've listed the rest of their syn values down below.

  • New York Bakery Bagel Thins The Original 4 Pack - 6 syns.
  • Village Bakery Soft White Sliced Sandwich Thins - 5 syns.
  • New York Bakery Co. Seeded Bagel Thins - 6 syns.
  • Warburtons 6 Brown Sandwich Thins - 5 syns.
  • Deli Kitchen Seeded Folded Flatbread Thins - 5.5 syns.
  • Deli Kitchen Plain Folded Flatbread Thins - 5.5 syns.
  • Warburtons White Sandwich Thins 6 Pack - 5 syns.
  • Warburtons Thin Bagels Plain 6 Pack - 6.5 syns.
  • Warburton 4 Protein Thin Bagels - 8 syns.
  • Village Bakery High Protein Sandwich Thins - 6 syns.
  • Village Bakery Soft Brown Sliced Sandwich Thins - 5 syns.
  • M&S Made Without Seeded Sandwich Thins - 6.5 syns.
  • Warburtons Thin Bagels Cinnamon & Raisin 6 Pack - 6.5 syns.
  • Village Bakery Both In One Sandwich Thins 6x40g - 5 syns.
  • Warburtons White Thins Gluten - 6.5 syns.
  • Village Bakery Plain Bagel Thins 6 Pack - 6 syns.

Low Syn Filling Ideas For Your Sandwich Thins

To keep your sandwich thins low in syns, you also need to consider what you are filling them with, we've listed a few low syn filling ideas for an easy lunch below.

  • Cucumbers and cream cheese.
  • Salsa and chicken - Syn free.
  • Avocado and tomato - 7 syns for half.
  • Peanut butter and banana slices - 4.5 syns a spoon.
  • Canned tuna, sweetcorn and quark - Syn free
  • Eggs - Eggs are syn free on the slimming world.

Final Words

To conclude, sandwich thins are low in syns, having 5 syns a thin but do not differ much to normal bread which comes in at 6 syns for two slices, you can also have wholemeal thins as your healthy extra B or wholemeal bread to save syns.

We would suggest using syn free fillings or other types of low syn foods in our list above to keep your sandwiches low in syns.

Frequently Asked Questions

How are syn values calculated?

Syn values are calculated using a formula based on calories, saturated fat and sugar content per serving. They’re not the same as calories — a product can be low in calories but higher in syns if it’s high in sugar or fat. Always check the official Slimming World app for the most accurate and up-to-date syn values.

Do syn values change?

Yes. When manufacturers reformulate their products, the syn value can go up or down. This is why we recommend double-checking with the Slimming World app or your consultant, especially if a product’s packaging has changed recently.

How many syns should I have per day?

Most Slimming World members work with 5 to 15 syns per day. Your consultant will advise on the right amount for you. The key is to use your syns on the things you enjoy most — whether that’s a chocolate bar, a glass of wine, or a packet of crisps.

Jennifer
Jennifer is a certified nutritionist and weight loss coach with a Master's in Nutrition from Cambridge. With over 10 years experience, she shares healthy recipes and science-backed slimming tips on SheCooksSheEats to help people reach their wellness goals. Jennifer stays up-to-date by regularly attending conferences and continuing her nutrition education. She aims to provide research-backed advice to inspire balanced, happy living.
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