What Are The Universal Bed Frame Dimensions?

The Big Fig Universal Bed Frame adjusts to fit standard mattress sizes. The mattress dimensions it accommodates are: Twin: 38" W × 75" L Twin XL: 38" W × 80" L Full: 54" W × 75" L Queen: 60" W × 80" L King: 76" W × 80" L California King: 72" W × 84" L The frame itself is 7.5" high, with 71" L side rails and 2" tall reinforced side rails. Be sure to follow the assembly instructions to ensure the frame is adjusted to the correct size.

What Is The Difference Between A Bed Frame And Bed Foundation?

A bed frame is the outer structure that supports and elevates your bed that holds the foundation and mattress. A bed foundation sits directly under the mattress, which then sits on a bed frame, providing a supportive sleep system and preventing sagging. A foundation can be a box spring, slatted base or solid platform. The Big Fig Bed Frame is a metal bed frame that works best with an accompanying Big Fig Heavy Duty Foundation or Big Fig Ultra Low Profile Foundation.

Do I Need A Bed Frame And Mattress Foundation?

Not always. A bed frame and foundation serve different purposes, but whether you need both depends on your sleep setup. A bed frame holds your mattress off the floor under your foundation adding height and style, while a foundation provides a sturdy, even surface for your mattress. Some bed frames, like the Big Fig Platform Bed, are designed with built-in support, so you don’t need a separate foundation (bonus points for easy assembly). But if you have a more traditional metal bed frame that doesn’t offer enough support, you’ll likely need to add a foundation to prevent sagging and extend your mattress’s lifespan. The key is to ensure your mattress has a solid, supportive base—whether a foundation, a platform bed or a reinforced frame. And, of course, pair your accessory of choice with a Big Fig Mattress.

Can I Put My Mattress Directly On The Metal Bed Frame?

No, a Big Fig Mattress cannot be placed directly on the Bed Frame. A foundation is needed to support the mattress with a traditional metal frame. Learn more about what existing bed and mattress accessories work best with Big Fig products.

Will My Under-bed Storage Fit Under The Big Fig Bed Frame?

Yes. The Big Fig Bed Frame has 7.5 inches of available space below it. As long as your storage is shorter than 7.5 inches, it will fit under the Big Fig Bed Frame.

Can I Purchase Only The Big Fig Bed Frame?

Yes. The Big Fig Bed Frame is available as a standalone purchase.

Is The Big Fig Universal Bed Frame Tool-free?

No. The Big Fig Universal Bed Frame requires a standard Phillips-head screwdriver for assembly. Be sure to follow the included assembly instructions to properly assemble and adjust the frame to the correct size for your mattress.

Big FigMetal Bed Frame - King

Name: Big Fig Metal Bed Frame - King
Brand: Big Fig Mattress
SKU: XM66G-0060
Price: 249 USD
Availability: InStock
Rating: 0 (0 reviews)

When you need a metal bed frame that doesn’t mess around, meet the Big Fig Bed Frame.

Supports up to 2,500 lbs - For lots of body types
Recycled Railroad Steel - Heavy-duty strength from sturdy repurposed steel
Quick & Easy Assembly — Goes together fast with just one tool

Please Note: Your Big Fig Mattress can’t go straight on the Bed Frame—you need a Foundation to make the magic happen. The Big Fig Twin Bed Frame fits both Twin and Twin XL Mattresses. Not eligible for returns or our 120-night sleep trial.

Heads Up: We’re currently transitioning to a new Metal Bed Frame. Product design and assembly requirements vary by size during this transition. Select your size and watch the assembly video and written instructions for the frame you’ll receive.