3 Ways to Wear the Slim Stretch Casual Pants (2026)

Six waist sizes, five colours, $29.99: here is what to put with the trousers Adam & Westcott sells more of than almost anything else.

Last updated: October 2026

The Slim Stretch Casual Pants come in six waist sizes, 30 to 40 inches in even steps, and five colours at $29.99, and the three outfits below pair them with an Adam & Westcott top, a layer and a shoe for work, smart casual and the weekend. Over the last 14 days they were the store's second best-selling product, behind only the Urban Oxford Sneakers.

In this article

• The pants
• Three outfits compared
• Outfit 1: workwear
• Outfit 2: smart casual
• Outfit 3: weekend
• Belt sizing
• FAQ

What are the Slim Stretch Casual Pants?

A slim-cut, four-way-stretch trouser in an ultra light moisture-wicking fabric, $29.99, sold by waist inch from 30 to 40 in even steps, in Light Grey, Grey, Army Green, Black and Green. Sold by the inch, not by letter, so you order the number off your own trousers.

How do the three outfits compare?

Each full look stays under $170, and every piece is carried in a size run that covers a waist 30 to 40 trouser.

Outfit	Best for	Key spec	A&W top piece	Full look
Workwear	On site, commuting	Washed twill jacket, XS to 2XL	Modern Workwear Denim Shirt	$166.95
Smart casual	Office, dinner, dress codes	Shirt chest 45.7 in at L	CoreOps Button-Up Shirt	$159.96
Weekend	Walks, errands, travel	Vest S to 6XL, nine sizes	Softshell Fleece Vest	$119.96

Outfit 1: what goes with stretch pants for work?

A denim overshirt and a washed twill chore jacket, which add two layers without bulk over a slim trouser. The denim shirt is the trimmest of Adam & Westcott's top five shirts, a 40.2 in chest at L, so it sits close under a jacket.

• Modern Workwear Denim Shirt, $36.99, S to XL, in Blue, Black or Light Blue
• Washed Chore Jacket, $59.98, XS to 2XL, washed cotton twill, flat welt chest pockets
• Urban Oxford Sneakers, $39.99, US 6.5 to 14 in complete half sizes

Best for a commute and a site visit in one outfit. Army Green or Black hides the day best.

Outfit 2: how do you dress up stretch casual pants?

Swap the overshirt for a button-up, add a leather belt and a watch, and keep the trousers in Black or Grey. Three changes, and the look clears most smart-casual dress codes.

• CoreOps Button-Up Shirt, $49.99, chest 42.5 in at S rising to 45.7 in at L. sold in S to XL only, so XL is the top of the run
• Marenzo Brass Leather Belt, $39.99, sold in 2 inch waist ranges from 34 to 36 up to 42 to 44
• Bold Dial Sport Watch, $39.99, in five dial colours

Best for crossing from desk to dinner. The full look lands at $159.96.

Outfit 3: what do you wear on the weekend?

A fleece vest over a tee and a cushioned walking shoe, the lightest look at $119.96. The vest runs S to 6XL across nine sizes, the widest run here.

• Softshell Fleece Vest, $39.98, S to 6XL, high collar and zip pockets
• Wide Fit Walking Shoes, $49.99, US 6.5 to 14 in complete half sizes, five colours

Best for travel days and long walks, where the four-way stretch earns its place.

What belt size fits a waist 30 to 40 pant?

A&W belts are sold in 2 inch waist ranges, and the range should contain your trouser waist number, so a waist 36 trouser takes the 36 to 38 belt. The Marenzo Brass Leather Belt starts at 34 to 36, leaving the two smallest trouser waists uncovered. In a 30 or a 32, take the Belmont Signature Belt at $59.98 instead, which opens at 30 to 32 and runs to 42 to 44 in seven steps.

Frequently asked questions

What size Slim Stretch Casual Pants should I buy?

Order the waist inch you already wear, from 30, 32, 34, 36, 38 and 40. The cut is slim with four-way stretch, so there is no need to size up.

Can you wear stretch casual pants to the office?

Yes, in Black or Grey with the $49.99 CoreOps Button-Up Shirt and a leather belt, which reads smart casual rather than athletic.

What shoes go with slim stretch pants?

The $39.99 Urban Oxford Sneakers for work and smart casual, or the $49.99 Wide Fit Walking Shoes for the weekend. Both run US 6.5 to 14 in complete half sizes.

What colour trousers are the most versatile?

Black and Grey cover all three outfits. Army Green and Green suit the workwear look, and Light Grey is the lightest of the five.

How much does a full outfit cost?

Between $119.96 for the weekend look and $166.95 for the workwear look. The trousers are $29.99 of that.

For more on A&W trousers read Fleece Lined Trousers for Men, and for the shoe in two of these looks see Urban Oxford Sneakers: Sizing and Fit and our best-selling men's shirts.