Men's Suits

Skip to main content Skip to footer content

Limited-Time Offer | 12% off NT$14,900+ | 18% off NT$16,850+ | 25% off NT$33,950+. SHOP WOMEN SHOP MEN T&C apply

Welcome Offer | Subscribed to enjoy special offer on your first full-price purchase. T&C apply.

New Arrivals

Back
- Women
  - Shop All New Arrivals
- Men
  - Shop All New Arrivals
- Women's New Arrivals
- Men's New Arrivals
- New Arrivals
  
  Shop Women
- New Arrivals
  
  Shop Men
Women

Back
- New + Now
- Clothing
  - View All
  - Jeans
  - Pants
  - Blazers, Jackets + Vests
  - Dresses
  - T-Shirts
  - Tops
  - Skirts
  - Suits
  - Sweaters + Cardigans
- Accessories
  - Belts
- Bestsellers
- Sale
  - Sale
  - Last Chance
- Tailoring Redux
  
  Shop Now
- Regal Wool
  
  Shop Now
Men

Back
- New + Now
- Clothing
- Accessories
  - Bags
- Bestsellers
- Sale
  - Sale
  - Last Chance
- Tailoring Redux
  
  Shop Now
- Regal Wool
  
  Shop Now
Sale

Back
- Women
  - Sale
  - Last Chance
- Men
  - Sale
  - Last Chance

Wishlist

Shop By

New Arrivals

Back
Women

Back
Men

Back
Sale

Back
- Women
  - Sale
  - Last Chance
- Men
  - Sale
  - Last Chance

Order Tracking
Store Locator

Clear

Sign In / Register

checkout

View my bag

Worn together or deconstructed, this season's suiting is so sharp you'll reach for it even on your days off.

Filter By

Raffi 5-Pocket Trousers in Neoteric Twill

null ~~Price reduced from to~~ NT$ 8,550

Limited-Time Offer | 12% off NT$14,900+ & Up to 25% Off

Quick Add

Chambers Blazer in Stretch Wool

null ~~Price reduced from to~~ NT$ 23,500

Limited-Time Offer | 12% off NT$14,900+ & Up to 25% Off

Quick Add

Mayer Trousers in Stretch Wool

null ~~Price reduced from to~~ NT$ 9,650

Limited-Time Offer | 12% off NT$14,900+ & Up to 25% Off

Quick Add

Chambers Blazer in Stretch Wool

null ~~Price reduced from to~~ NT$ 23,500

Limited-Time Offer | 12% off NT$14,900+ & Up to 25% Off

Quick Add

Mayer Trousers in Stretch Wool

null ~~Price reduced from to~~ NT$ 9,650

Limited-Time Offer | 12% off NT$14,900+ & Up to 25% Off

Quick Add

Zaine Trousers in Precision Ponte

null ~~Price reduced from to~~ NT$ 8,550

Purchase 3 Pieces to Unlock Bundle Price

Quick Add

Clinton Blazer in Precision Ponte

null ~~Price reduced from to~~ NT$ 17,100

Limited-Time Offer | 12% off NT$14,900+ & Up to 25% Off

Quick Add

Clinton Blazer in Performance Suiting

null ~~Price reduced from to~~ NT$ 19,800

Limited-Time Offer | 12% off NT$14,900+ & Up to 25% Off

Raffi 5-Pocket Trousers in Neoteric Twill

Quick Add

Raffi 5-Pocket Trousers in Neoteric Twill

null ~~Price reduced from to~~ NT$ 8,550

Limited-Time Offer | 12% off NT$14,900+ & Up to 25% Off

Quick Add

Zaine Trousers in Precision Ponte

null ~~Price reduced from to~~ NT$ 8,550

Purchase 3 Pieces to Unlock Bundle Price

Quick Add

Clinton Blazer in Precision Ponte

null ~~Price reduced from to~~ NT$ 17,100

Limited-Time Offer | 12% off NT$14,900+ & Up to 25% Off

Quick Add

Raffi 5-Pocket Trousers in Neoteric Twill

null ~~Price reduced from to~~ NT$ 8,550

Limited-Time Offer | 12% off NT$14,900+ & Up to 25% Off

Join our mailing list for our latest updates and enjoy 15% off your first full price order. Learn more about our privacy policy here.

forms.newsletter.successresult

Customer Care

My Account
Track My Order
Returns & Exchanges
Shipping & Payments
Size Chart & Alterations
FAQs

About Us

About Us
Theory for Good
Stores

Mon-Fri: 9am-6pm GMT (excluding holidays)
Email

Site Map

Exclusions

Customer Care

My Account
Track My Order
Returns & Exchanges
Shipping & Payments
Size & Alterations
FAQs

About Us

About Us
Stores

Contact Us

Mon-Fri: 9am-6pm GMT (excluding holidays)
Email

Legal

Terms of Use
Privacy Policy
Exclusions

Site Map

Exclusions

WELCOME OFFER
(1) Promotional Period: From April 1, 2024 until further notice. (2) Eligibility: Customers who successfully subscribe to Theory Newsletters during the Promotional Period (“Eligible Customers”). (3) Designated Store in respect of this Promotion: The new Theory Online Store at hk.theory.com, tw.theory.com, sg.theory.com and au.theory.com (collectively “Theory Online Stores”). (4) How to enjoy this Promotion: Eligible Customers can enjoy 15% off on regular-priced products at Theory Online Stores (subject to the Excluded Products as defined below) (the “Discount”) by entering the promotional code at checkout. The promotional code would be sent, via email, to Eligible Customers upon successful newsletter registration. (5) General Terms and Conditions: The Discount only applies to the first order placed by Eligible Customers on Theory Online Stores. The Discount does not apply to the purchase of Bundles items and discounted products (the “Excluded Products”). The Discount cannot be used in conjunction with any other discounts, promotional offers and coupons (including but not limited to Theory VIP discounts/Theory VIP Birthday discounts, Credit Card Year-Round Discount and Theory CRM Coupons). The Discount cannot be transferred nor exchanged for cash or any other gifts or coupons. Theory reserves the right to amend these Terms and conditions without prior notice. Theory reserves the right of final decision in case of any dispute.

BUNDLE PROMOTION
(1) Promotional Period: The Promotional Period is from 1 July, 2025 until further notice. (2) Designated Store in respect of this Promotion: Theory Online Store at hk.theory.com, tw.theory.com, sg.theory.com and au.theory.com (collectively “Theory Online Stores”). (3) How to enjoy this Promotion: During the Promotional Period, all customers can enjoy an additional discount upon purchasing, as the case maybe, 2 or 3 items of the same style (as may be designated by Theory from time to time) in any size or color (collectively the “Designated Items”) in one single transaction at Theory Online Stores (collectively the “Discount”). The Designated items, and the number of Designated Items required to be purchased to unlock the Discount, will be specifically marked on Theory Online Stores. Customers are required to add the Designated Items into bag to unlock the amount of the Discount. The Discount will automatically apply at checkout. (4) General Terms and Conditions: The Discount cannot be used in conjunction with any other discounts, promotional offers and coupons (including but not limited to Theory VIP discounts/Theory VIP Birthday discounts, Credit Card Year-Round Discount and Theory CRM Coupons). The Discount cannot be transferred nor exchanged for cash or any other gifts or coupons. Theory reserves the right to amend these Terms and conditions without prior notice. Theory reserves the right of final decision in case of any dispute.

KELSO SPECIAL OFFER
(1) Promotional Period: The Promotional Period is from 1 August 2026 to 11 October 2026 (both days inclusive). (2) Designated Store in respect of this Promotion: Theory Online Store at hk.theory.com, tw.theory.com, sg.theory.com and au.theory.com (collectively “Theory Online Stores”). (3) How to enjoy this Promotion: During the Promotional Period, all customers can enjoy 25% off (the “Discount”) upon the purchase of two regular-priced Kelso items in one single transaction at any Theory Online Stores. The discount applies to regular-priced items only, and does not apply to any other products. The Discount will automatically apply at checkout. (4) General Terms and Conditions: This promotion only applies to regular-priced items, and does not apply to Bundles and discounted products. The Discount cannot be used in conjunction with any other discounts, promotional offers and coupons (including but not limited to Theory VIP discounts/Theory VIP Birthday discounts, Credit Card Year-Round Discount and Theory CRM Coupons). The Discount cannot be transferred nor exchanged for cash or any other gifts or coupons. This promotional offer cannot be used in conjunction with Theory staff discount. Theory reserves the right to amend these Terms and conditions without prior notice. Theory reserves the right of final decision in case of any dispute.

LIMITED TIME OFFER – BUY MORE SAVE MORE
(1) Promotional Period: The Promotional Period is from 25 September, 2026 to 7 October, 2026 (both days inclusive). (2) Designated Store in respect of this Promotion: Theory Online Store at hk.theory.com, tw.theory.com, sg.theory.com and au.theory.com (collectively “Theory Online Stores”). (3) How to enjoy this Promotion: During the Promotional Period, all customers can enjoy the following discounts (collectively the “Discount”) upon meeting the following designated purchase threshold in one single transaction at Theory Online Stores: (1) 12% off upon a single purchase of NT$14,900; and (2) 18% off upon a single purchase of NT$16,850; and (3) 25% off upon a single purchase of NT$33,950. The Discount will automatically apply at checkout. (4) General Terms and Conditions: The Discount does not apply to Bundles items, permanent/core and discounted products (the “Excluded Products”). The Excluded Products can be counted toward the accumulated spending amount. The Discount cannot be used in conjunction with any other discounts, promotional offers and coupons (including but not limited to Theory VIP discounts/Theory VIP Birthday discounts, Credit Card Year-Round Discount and Theory CRM Coupons). The Discount cannot be transferred nor exchanged for cash or any other gifts or coupons. This promotional offer cannot be used in conjunction with Theory staff discount. Theory reserves the right to amend these Terms and conditions without prior notice. Theory reserves the right of final decision in case of any dispute.