SPANX® Poplin Oversized Button-Up Shirt – Timeless Navy & White

Made to fit you: comfortable, effortless style in sizes M–3x.

Meet the button-up shirt your wardrobe has been waiting for. The SPANX® Poplin Oversized Button-Up Shirt in Timeless Navy & Classic White gives the timeless button-down a polished upgrade with premium Supima® cotton, a relaxed oversized fit, and thoughtful details designed for comfort and confidence.

Featuring a high-low shirttail hem for added coverage and a pleated back detail for a beautiful drape, this elevated wardrobe essential can be worn tucked, untucked, layered, or styled open. Lightweight yet durable, it's the perfect year-round piece for creating effortless outfits.

Why You'll Love It

• Premium Supima® cotton feels soft, smooth, and elevated
• Timeless navy and white color combination pairs with everything
• Oversized silhouette provides comfortable movement and easy layering
• Perfect for work, travel, weekends, and everyday wear
• Lightweight yet durable fabric makes it ideal year-round
• High-low shirttail hem provides flattering coverage
• Pleated back detail creates a polished, effortless drape
• Pairs perfectly with Judy Blue denim, SPANX® pants, skirts, and layers

Fit & Feel

• Fit: Oversized, relaxed fit designed to be worn comfortably loose
• Size correlation: M (8–10) · L (12–14) · xL (16) · 1x (18–20) · 2x (22–24) · 3x (26)
• Length: High-low shirttail hem
• Fabric feel: Lightweight woven Supima® cotton poplin
• Stretch: Non-stretch
• Neckline: Classic collar with button-front closure
• Sleeves: Long sleeves with button cuffs
• Layering-friendly: Yes

If between sizes, stay true to size for the intended oversized look or size down for a more fitted silhouette.

Who It's Great For

This style is especially flattering for:

Circle Shapes – The relaxed oversized fit and high-low hem provide comfortable coverage while creating an effortless, polished look.

Triangle Shapes – The structured collar and shoulder details draw attention upward while the flowy silhouette skims comfortably over the hips.

Hourglass Shapes – The lightweight fabric drapes beautifully and can be styled tucked or untucked to highlight your natural shape.

Rectangle Shapes – The oversized silhouette, pleated back detail, and layering options add dimension and create a polished look.

Inverted Triangle Shapes – The relaxed fit balances the silhouette while maintaining a clean, elevated style.

Remember: These are styling suggestions, not rules. The best outfit is always the one that makes you feel confident.

Fabric & Care

• Fabric content: 100% Supima® Cotton
• Wash: Machine wash cold, gentle cycle, with like colors
• Only non-chlorine bleach when needed
• Dry: Tumble dry low; remove promptly
• Iron: Low iron if needed
• Or dry clean

Styling Ideas

• Pair with Judy Blue jeans and loafers for a timeless elevated casual look.
• Wear open over a fitted tee or tank for effortless layering.
• Tuck into trousers for a polished office-ready outfit.
• Style with SPANX® pants for a sleek, professional look.
• Add gold jewelry and a structured handbag for a complete boutique outfit.

Model Info

Leslie

• Height: 5'5"
• Usual Size: 18, 2x-3x
• Wearing Size: 3x

Why Shop Love Marlow

At Love Marlow, we specialize in stylish mid- and plus-size clothing made to fit you, in sizes 8–28. Every piece is thoughtfully selected for flattering fits, comfortable fabrics, and styles that help you create outfits you'll feel confident wearing.

As a women-owned boutique in Sioux Falls, South Dakota, we offer personalized styling, exceptional customer service, and fashion-forward pieces you won't find everywhere else.

Whether you're shopping online or visiting us in store, we're here to make finding clothes you love easier.

Looking For More Boutique Styles?

Love this style? Keep shopping Love Marlow for more boutique tops, denim, dresses, bottoms, layering pieces, handbags, jewelry, and accessories designed for women in mid and plus sizes 8–28.

Looking for a different fit or style? Explore our newest arrivals and everyday boutique favorites to find pieces you'll love wearing again and again.

Size Chart | Measurements

We understand that every body is unique, so we've provided garment measurements above to help you find your best fit. Please note that measurements are taken from a single piece, and even items in the same size may vary slightly.

Need extra help? Connect with us via chat! We love helping you find styles that fit and flatter at Love Marlow — your Sioux Falls, SD mid-size and plus-size boutique.