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Sienna Straight Leg Jeans

Product code: T577566

About this style

Add a touch of contemporary style to your everyday wardrobe with these Sienna denim jeans. The mid-rise design and straight leg cut offer a classic silhouette, while the super stretchable fabric provides all-day comfort and flexibility with a soft, comfortable feel. Perfect for casual wear, finished with a practical button and zip fastening for a secure fit. M&S Collection: easy-to-wear wardrobe staples that combine classic and contemporary styles.

Straight: Classic fit from hip to hem

Details & care

Item details

Model Height: 5ft9"/176cm

Model is wearing size: 8 Long

Fit and style

Straight leg

Button and zip fastening

Mid rise

Composition

80% cotton, 18% polyester and 2% elastane

Care

Wash at 40°C

Do not bleach

Do not tumble dry

Iron at medium temperature

Do not dry clean

M&S

Sienna Straight Leg Jeans

£26

Colour

Customers say:

Fits true to size()
Waist

Inside Leg

Free standard delivery over £75

Reviews (12980)

4.3

67% Recommended this product

Mentions
01 June 2026Nogginnog
Verified Purchase

Flattering and very good value.

Yes, I recommend this

Very pleased with my new jeans. They're the best fitting pair I've found in a long time Iand just the weight I was looking for. A little higher than mid-rise but thankfully not high-waisted, which I find uncomfortable and always gapes on me. Great value for the money.

Reviewer Ratings

How did it fit?

True to size

Length

Good

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Material

Excellent

Style

Excellent

01 June 2026Jmad09
Verified Purchase

M&S Quality

Yes, I recommend this

Great Fit, great quality and stylish. Best M&S branded jeans!

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

01 June 2026Yorkshire Lass 54
Verified Purchase

The best jeans!

No, I don't recommend this

Being tall, M&S is the best place to buy trousers/jeans. These are very comfortable, with soft fabric that fit well on the waist. Quick delivery via store. Good value for money.

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Good

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Good

01 June 2026TS Customer
Verified Purchase

Great fit

Haven’t worn jeans for ages and tried these - perfect. Bought in dark denim and light. Lovely fit

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

01 June 2026Goldie13
Verified Purchase

Love these jeans

Yes, I recommend this

The Sienna Jean fits really well, is comfortable to wear, I have in several colours.

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Good

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Good

01 June 2026CABBOTT
Verified Purchase

Sienna straight leg jeans

Originally posted on marksandspencer.ie

Yes, I recommend this

I always buy these jeans as they seem to be my 'shape' and are comfortable. I ordered the high waist and the standard waist this time as I am high waisted and wanted to try the latter for a change. However I found them too high surprisingly! But the standard ones, as usual, still a good shape for me. I would say that the sizing is coming up slightly smaller than the blue jean Sienna I have ordered in the past and I think I'm probably now a size 13 - but the size 14 which I ordered fit in an 'easy fit' rather than snug. I sent the high waists back and was reimbursed very quickly. I would buy again and again.

Helpful?

31 May 2026Irisflowers
Verified Purchase

Quality item at reasonable price

Yes, I recommend this

As described, excellent fit . Price very good for quality item

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Good

Style

Good

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Good

Style

Good

31 May 2026justjudy
Verified Purchase

Great jeans

Yes, I recommend this

Have the blue denim version so knew these would work. Ordered the long which is just too long but I’m happy to turn up and pop in some stitches!!

Reviewer Ratings

How did it fit?

True to size

Length

Excellent

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Excellent

Value for Money

Excellent

Material

Excellent

Style

Excellent

30 May 2026Linda3057955
Verified Purchase

Great Jeans

Yes, I recommend this

These are really comfortable jeans, they have a little stretch which I find really important as I don’t like really thick and heavy jeans.

Reviewer Ratings

How did it fit?

A bit large

Length

Excellent

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

A bit large

Length

Excellent

Value for Money

Excellent

Material

Excellent

Style

Excellent

30 May 2026JaqiCoolbear
Verified Purchase

Affordable fashion

Yes, I recommend this

Great jeans - very comfortable & true to size - wil definitely buy another pair

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

30 May 2026RevEwer
Verified Purchase

Great fit/quality/colour & style

Yes, I recommend this

I wanted Dark Indigo jeans to wear in a hotel in the evening. I know this style fits me well.

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

30 May 2026K74Gl
Verified Purchase

Value for money

Yes, I recommend this

These jeans fit me well and are comfortable to wear. I now have a few pairs of them. Nice mid blue colour.

Reviewer Ratings

How did it fit?

True to size

Length

Excellent

Value for Money

Excellent

Material

Excellent

Style

Good

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Excellent

Value for Money

Excellent

Material

Excellent

Style

Good

29 May 2026Trishy18
Verified Purchase

Comfortable jeans

Yes, I recommend this

Very comfortable jeans, nice to wear with trainers, sandals or boots.

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

29 May 2026ME1313
Verified Purchase

Really good pair of jeans

Yes, I recommend this

Jeans are a great fit and look stylish without having to go all in with the barrel trend! Just right for me.

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

29 May 2026Von2607
Verified Purchase

Great quality jeans

Love these jeans, had them before, bought again, haven’t changed, fit well and comfy.

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

28 May 2026Sarah triathlete
Verified Purchase

Great jeans

Yes, I recommend this

Always loved Sienna jeans as they fit me really well

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Good

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Good

Material

Excellent

Style

Excellent

28 May 2026Challen222
Verified Purchase

Fantastic jeans.

Yes, I recommend this

Love these jeans. Bought them then realised I already had a pair so returned. They are comfortable and flattering.

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

28 May 2026Rachel J F
Verified Purchase

Reliable fit and quality

Yes, I recommend this

Get the same ones every year in blue and in black. Good fit , good quality, good price.

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

28 May 2026Y_Ash
Verified Purchase

Good Jeans

Yes, I recommend this

Comfortable, good materials and fit well. This is my third pair of the Sienna Straight Leg!

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

Helpful?

Reviewer Ratings

How did it fit?

True to size

Length

Good

Value for Money

Excellent

Material

Excellent

Style

Excellent

27 May 2026Tooter54
Verified Purchase

Simply the best

Yes, I recommend this

These jeans are my go to all the time, so comfortable. More colour for spring/autumn would be nice.

Reviewer Ratings

How did it fit?

Very small

Length

Fair

Value for Money

Good

Material

Good

Helpful?

Reviewer Ratings

How did it fit?

Very small

Length

Fair

Value for Money

Good

Material

Good

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