Home > LookSky Blog > What Not to Wear as a Rectangle Body — 7 Fall Swaps That Work (2025)

What Not to Wear as a Rectangle Body — 7 Fall Swaps That Work (2025)

August 15, 2025

Rectangle shape style guide what to wear and skip

Picture this: it's the first crisp fall morning, you've got your PSL and your go-to jeans and tee combo. You look fine—but when you catch your reflection, something's missing. It's comfortable, sure, but it's not making you feel like the main character of your own life.

Here's the thing about dressing for your rectangle body shape: you have this incredible canvas to work with. When you know which fall pieces add curves, create waistlines, and build the silhouette you want, that "just fine" outfit transforms into something that makes you feel unstoppable.

LookSky is your favorite online clothing store—but smarter. See your picks, try them on, and buy what actually works. Every look is matched to your shape, color season, and vibe.

We're not a styling app that gives you generic fall inspiration. We're the shopping app that shows you exactly which pieces work for your rectangle shape—and lets you try them on virtually before you commit. No more guessing whether that blazer will create the waist definition you want or if those wide-leg pants will balance your proportions.

What’s the best way to dress a rectangle body shape for fall?

LookSky shows you what works for your shape, vibe, and color season—so you try on only what fits before you commit.

Rectangle Body Shape: Fall Styling Secrets

Rectangle shapes have beautifully balanced shoulders and hips with a straight silhouette. This fall, you have the perfect canvas for creating curves and definition through strategic layering, structure, and proportion. Think cozy sweaters that add visual interest and pieces that sculpt a waistline exactly where you want it.

Below—the fall pieces that work for your shape, and how to style them for maximum impact.

1. Skip: Straight, Shapeless Sweaters

Why they miss: Chunky knits with no taper at the waist keep your body looking boxy.

Swap in:Relaxed Cable-Knit Belted Cardigan

• Works for: Rectangle shapes who want waist definition without bulk

• Emotional win: Feels like wrapping yourself in a blanket, but still looks pulled together

LookSky Picks:

• Single Origin Cashmere Sweater from Cuyana

• Halcyon Cardigan from Revolve

Try it on virtually in LookSky to check if the belted cardigan hits all the right places and flatters your shape.

2. Skip: Low-Rise, Loose Jeans

Why they miss: They flatten your hips and remove any chance of a waistline.

Swap in:High-Waist Straight Ankle Jean

• Works for: Creating a defined waist and elongating legs

• Emotional win: Suddenly every sweater half-tuck looks effortless

LookSky Picks:

• Denim High Rise Skinny Jeans in 28" Inseam by Dia

• The Way-High Hourglass Jean from Everlane

Virtual try-on lets you see if this timeless trench becomes your new go-to fall bottoms.

3. Skip: Long, Unstructured Coats

Why they miss: They add a lot of vertical without breaking up your silhouette.

Swap in:Double-Breasted Cropped Wool Coat

• Works for: Adding shoulder structure and shaping your middle

• Emotional win: You’ll look “put together” even on a coffee run

LookSky Picks:

• Colette Trenchcoat by Revolve

• Seeley Coat by Revolve

Use virtual try-on to test how this trench coat works with your proportions—see if it's your new fall power piece.

4. Skip: Crewneck Everything

Why they miss: They keep your neckline closed off and your upper body flat.

Swap in:Fitted Polo Sweater

• Works for: Drawing the eye inward and creating shape up top

• Emotional win: Cozy meets subtly sultry

LookSky Picks:

• Featherweight Cashmere Polo Sweater by Naadam

• Gatun by TwoThirds

Virtual try-on in LookSky to see how this piece works with your color season—especially if you're a Deep Autumn testing those rich jewel tones.

Best wrap tops for rectangle body shapes

5. Skip: Loose Button-Down Shirts Worn Untucked

Why they miss: They hang straight down with no waist definition, creating a boxy silhouette.

Swap in:Wrap Top

• Works for: Knotting at the waist creates instant definition while the silk drape adds feminine movement

• Emotional win: Looks effortlessly chic and works perfectly for fall layering under trench coats

LookSky Picks:

• Victory Rib Top by Saint + Sofia

• Thriving Wrap Top by Revolve

Try it on virtually on the LookSky app to see how the knot placement creates the most flattering waistline for your body.

Best A-line knit dresses for rectangle body shapes

6. Skip: Monochromatic Maxi Dresses

Why they miss: They create one long, unbroken line from neck to ankle.

Swap in:A-lIne Knit Midi Dress

• Works for: The fitted bodice and flared skirt create curves helps define your waist

• Emotional win: Feels feminine and put-together without trying too hard

LookSky Picks:

• Stolen Kisses Sweater Dress by Flying Tomato

• Nemy Knit Dress by Reformation

Use LookSky's virtual try-on to see how the belt placement creates your ideal waistline.

Best mock turtlenecks for rectangle body shapes

7. Skip: Loose Turtleneck Sweaters

Why they miss: They add bulk to your upper body without creating any waist definition, making you look shapeless.

Swap in:Ribbed Mock Neck Fitted Top

• Works for: The fitted silhouette hugs your body while the mock neck adds visual interest without overwhelming bulk

• Emotional win: Feels cozy and fall-appropriate while actually showing your shape

LookSky Picks:

• Carter Merino Mockneck by Revolve

• Pauline Mock Neck Sweater by Revolve

Try it on virtually to see how the fitted cut creates a sleek base for layering jackets or cardigans.

[Skip the guessing—try it on your body now]

FAQs

Q: Can I wear oversized styles if I’m a rectangle shape?
A: Yes, but balance is key. Pair oversized on top with something more fitted on the bottom—or vice versa—to avoid looking swallowed up.

Q: Does LookSky’s virtual try-on work for layered fall outfits?
A: Absolutely. We build your avatar with your actual face and body type, so you can see how layers sit and move—before you buy.

Q: Is it limiting to dress for my shape?
A: Not at all. It’s about knowing the rules so you can break them with intention.

"You deserve clothes that celebrate who you are right now. Your body isn't something to fix—it's something to dress beautifully. LookSky shows you exactly what works so you can feel confident in every outfit." — Samantha Shih, Co-Founder of LookSky

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