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That Guy's Secret

"That Guy's Secret: Where Modern Style Meets Fine Jewelry"

About Us

That Guy’s Secret is LaSalle, IL’s premier destination for fine jewelry and upscale men’s clothing, proudly serving Peru, Ottawa, Mendota, Streator, Utica, and surrounding areas since 2017. As a locally owned jewelry store and men’s boutique, we specialize in elegant fine jewelry, custom clothing, and private shopping experiences that elevate your personal style.

Browse our carefully curated collection of fine jewelry, featuring standout pieces perfect for engagements, anniversaries, gifts, and everyday luxury. Whether you're after something timeless or trend-forward, That Guy’s Secret brings quality and sophistication to every look.

Our men’s fashion offerings include custom-fit pants and shirts by Stantt, tuxedo and suit rentals, and wardrobe essentials from leading brands like Saxx Underwear, Mission Belts, and the Tasc Performance Line. From dressy to laid-back, we help modern men define their style.

Private shopping is available anytime during business hours, offering you one-on-one attention, expert advice, and a relaxed environment to explore our collections. Whether you're shopping for a special event or looking to completely build your wardrobe from the ground up, we’re here to make it effortless.

For fine jewelry, fashion-forward menswear, and a personalized shopping experience, visit That Guy’s Secret in LaSalle, IL — where your style is our mission.

Areas Served

Our Professional Associations

Illinois Valley Area Chamber of Commerce
La Salle Business Association

What We Offer

Our Specialties include:

Personal Shopping Subscription Boxes
Custom Fittings

Our Services include:

Big and Tall
Custom Fit Shirts and Pants
EMS, Fire and Police Custom Orders
Extended Sizes
Tuxedo Rentals
Buy and Sell Gold, Silver, and Platinum
Earrings
Watches

Our Brands include:

7 Diamonds
Allure Men Tuxedos
Alternative Shirts
American Needle
Banks Journal
Ben Sherman
Blue Q Socks
Callaway
Cole Hahn Shoes
Dakota Grizzly
Enro
Florsheim Shoes
FUN Socks
Fury Bros. Soap
Henleys
Hex Bags
Ike Bihar Tuxedos
Kenneth Cole Tuxedos
Knockaround Sunglasses
Liverpool Pants
Mavi Jeans
Michael Kors Tuxedos
Mission Belt
People Footwear
Perry Ellis Pants
Psycho Bunny
Retro Brand Graphic T-shirts
Rip Stop Pants
Roamers
Savane Pants
Saxx Underwear
Shottbros Sweaters
Sock It To Me
St. James of London Cologne
Stantt
Taclite Pants
Tallia Orange
Tasc Performance Line
The Ridge Wallets

Our Products include:

Accessories
Backpacks and Bookbags
Baseball Hats
Beanies
Belts
Blazers
Boxer Briefs
Casual Pants
Chinos Pants
Chains
Coffee
Cologne
Dress Shirts
Dress Shoes
Flannels
Golf Attire
Jackets
Jeans
Overcoats
Polos
Pullovers
Scarves
Shave Kits and Shave Cream
Shorts
Sleepwear
Slip-on Shoes
Soap
Socks
Sports Jackets
Suits
Sunglasses
Sweaters
Sweatpants and Joggers
T-shirts and Graphic T-shirts
Ties and Tie Clips
Tuxedoes
Vests
Wallets
Zip-up Sweatshirts and Hoodies

Testimonials

On 10/9/2025 Meredith Martin Olsen had this to say:
I have never gone into a shop and felt like they wanna truly make me happy. They took time find out exactly what I was looking for. Measured me for a shirt for my nephews formal wedding. My entire experience was amazing.

On 10/2/2025 Michael Urbanski had this to say:
That guys secret was the best place for me to go and find a new attire.. They were so helpful. I would recommend this place to everyone..

On 9/28/2025 William Jean had this to say:
The absolute best customer service ive ever had with anything, let alone shopping for clothes for events, I am very thankful that I can call myself a customer and highly suggest to anyone that they at least give this place a chance. Edit: fixed a spelling mistake

On 9/25/2025 Michael Maly had this to say:
Super friendly and great staff. Was a wonderful experience. Jeremy is the man! Love there selection of suits

On 9/18/2025 Crystal Smith had this to say:
We absolutely LOVE That Guy’s Secret! Any dance or special occasion that my son is going to I know all I have to do is take him there and they will get him all set up and looking great for the event! It’s all in once place which makes it so much easier than having to running to multiple different stores to get a full outfit! Highly recommend them, never disappointed! Also, so friendly and personable makes shopping more enjoyable all around!

Contact Us

That Guy's Secret
105 Marquette Street Suite B LaSalle, IL 61301
Phone: (815) 250-0928
Email: info@thatguyssecret.com

Corner of 1st and Marquette

Where To Find Us

Payment Types Accepted

Checks, American Express, Discover, MasterCard, Visa, Debit Cards

Our Hours

Holiday Hours May Vary. Please Call For Details.

Monday: 10:00 AM - 4:00 PM
Tuesday: 10:00 AM - 5:00 PM
Wednesday: 10:00 AM - 5:00 PM
Thursday: 10:00 AM - 7:00 PM
Friday: 10:00 AM - 4:00 PM
Saturday: 10:00 AM - 4:00 PM

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