A flannel shirt should feel comfortable through the shoulders and chest, reach just past the wrist at the cuff, and provide enough room to move or add a light layer. Once the fit is right, it can be worn buttoned with jeans, open over a T-shirt, or under a jacket when the temperature drops.

This guide explains how a men's flannel should fit, how to style different plaid colors, and when to choose a regular or tall size. When you are ready to find your color, shop the Demons Behind Me men's flannel collection.

How Should a Men's Flannel Shirt Fit?

The best fit depends on whether you plan to wear the flannel by itself or as a layer, but five checkpoints will tell you whether the size is right.

• Shoulders: The shoulder seams should sit close to the edge of your shoulders rather than pulling toward your neck or dropping far down your upper arm.
• Chest: You should be able to button the shirt without pulling or visible gaps. Leave enough room for comfortable movement.
• Sleeves: With your arms relaxed, the cuffs should reach just beyond the wrist bone. If the sleeves ride far up your forearm when you reach forward, compare the tall-size measurements.
• Body length: An untucked flannel should provide coverage without hanging like an oversized jacket. A shirt you plan to tuck in needs enough length to stay in place when you sit or bend.
• Layering room: If you will regularly wear a T-shirt underneath, make sure the chest and arms do not feel tight over that layer.

Always compare your measurements with the size chart on the individual product page. Several current Demons Behind Me flannels are available in regular sizes from Small through 5XL and tall sizes from LT through 3XLT, but availability varies by design.

Five Easy Ways to Wear a Flannel Shirt

1. Wear It Open Over a Graphic T-Shirt

An open flannel over a solid or graphic tee is an easy everyday combination. Keep the lower layer relatively close to the body so the outfit does not feel bulky. Dark denim and boots create a rugged look, while sneakers keep it more casual.

A meaningful graphic tee can also connect the layers visually and personally. Browse men's graphic T-shirts if you want a message-driven layer underneath the plaid.

2. Button It With Jeans

For a clean, straightforward outfit, button the flannel and pair it with dark or medium-wash jeans. Leave the top button open and keep the hem untucked for a relaxed appearance. A black-and-grey plaid such as the “Gentleman” flannel works especially well when you want the outfit to look sharp without feeling formal.

3. Add a Jacket for Colder Weather

Use a standard flannel as the middle layer between a T-shirt and a jacket. The shirt should have enough room through the shoulders and chest to move comfortably, but it should not bunch under the outer layer. For colder days when a shirt is not enough, the Insulated Flannel Jacket 3.0 adds a quilted lining, poly-fill insulation, a zipper-and-snap front, and zippered hand pockets.

4. Pair Plaid With Chinos or Work Pants

Neutral chinos or work pants let a bold plaid remain the focus. Black, charcoal, tan, olive and dark navy are dependable choices. If the flannel includes several strong colors, choose pants that repeat one of the darker tones rather than introducing another bright color.

5. Roll the Sleeves for a Relaxed Look

Unbutton the cuffs, fold each cuff back once, and continue with even folds until the sleeve sits below the elbow. Avoid pushing the sleeves into a tight bundle, which can feel restrictive and distort the shape of the shirt.

Should You Tuck in a Flannel Shirt?

Leave a flannel untucked for casual outfits, especially when it is worn open over a tee. Tuck it in when you want a cleaner line with fitted jeans or chinos. The hem should remain tucked when you move; if it pulls out immediately, compare the center-back length with a tall size.

How to Match Flannel Colors

The simplest approach is to choose one neutral color from the plaid and repeat it in your pants, shoes or jacket.

• Black and grey: Pair the “Gentleman” with black denim, blue jeans or charcoal pants.
• Teal, black and grey: Let the teal in the “Redemption” flannel stand out against black or dark-wash denim.
• Purple plaid: Ground the “Raven 2.0” with black jeans, grey pants or clean dark denim.
• Green, black and gold: Wear the “Lucky 2.0” with black or dark-blue jeans. This is a closeout design, so size availability can change.
• Red, white and blue: Keep the rest of the outfit simple when wearing the “Patriot” flannel. This is also a closeout design with changing availability.

Regular vs. Tall Flannel Sizes

A tall size is not simply a wider shirt. It adds useful length through the sleeves and body. For example, the current Demons Behind Me size chart lists a regular Large with a 34.5–36.5-inch sleeve range and a 32.25-inch center-back length. The LT lists a 37.5–39.5-inch sleeve range and a 33.25-inch center-back length.

Consider a tall size if regular sleeves consistently feel short, the shirt pulls out when tucked, or the hem rises too high when you reach forward. Choose by chest measurement first, then confirm sleeve and center-back length. Read the full men's tall flannel fit guide for measuring instructions and regular-versus-tall comparisons.

Hidden Snap Collars vs. Button-Down Collars

Many Demons Behind Me flannels use hidden collar snaps to help the collar hold its shape without changing the outward look. The “Blueprint” flannel uses a visible button-down collar and includes dual chest pockets with a glasses or pen holder. Choose the construction you prefer based on appearance and everyday use.

Demons Behind Me flannel shirts are lifestyle apparel. They are not armored garments or certified protective motorcycle equipment.

How to Wash and Care for a Flannel Shirt

Follow the care directions on the individual product. Current Demons Behind Me flannel shirts list a 50% cotton and 50% polyester blend and warn that shrinkage can occur. Machine wash cold, then hang dry or tumble dry on low when those instructions appear on the product page. The Insulated Flannel Jacket 3.0 has different materials and recommends dry cleaning, so do not use the shirt-care routine for the jacket.

Frequently Asked Questions

What do you wear under a flannel shirt?

A close-fitting T-shirt is the easiest layer. White, black, grey and other neutral colors work with most plaids, while a graphic tee adds more personality.

Can you wear a flannel shirt year-round?

A flannel can work across several seasons depending on the weather, fabric weight and how it is layered. Wear it on its own or open over a tee in milder conditions, and under a jacket when it gets colder.

Should you size up in a flannel?

Do not size up automatically. Compare your chest, sleeve and body measurements with the product-specific chart. Allow extra room if you want to layer, and account for the shrinkage warning listed on current Demons Behind Me flannel shirts.

Can you wear a flannel shirt while riding a motorcycle?

You can wear a flannel as casual lifestyle apparel, but a standard flannel does not replace protective riding gear. Use motorcycle equipment appropriate for your riding conditions and safety needs.

Find the Flannel That Fits Your Story

Start with fit, choose a color you will actually wear, and decide whether you need a shirt or an insulated outer layer. Every Demons Behind Me design carries its own name and meaning—from “Redemption” and “Survivor” to “Raven 2.0” and “Blueprint.”

Shop men's flannel shirts and plaid button-ups or read our guide to choosing the best flannel shirt for your needs.