Stop the Sag
Boxes at the bottom of the stack naturally bow and crease under weight over time. This stops it cold.
Built for sneaker purists
OG All Means
OG All.
Precision-fit supports that lock inside your sneaker boxes to carry the stack, stop sagging, and keep every corner pristine.
Shop your box size
Precision-fit. Small-batch made.
FSR-MK.I
Drag to explore
The proof is in the stack
Protection without the display-case drama.
Built to Stack
Tested to hold heavy sustained weight. You can literally stand on these frames; your boxes aren't going anywhere.
Perfect Factory Fit
Zero guesswork. Every single variant is molded to the exact internal factory dimensions of specific sneaker boxes from various eras.
In collectors’ hands
Don’t take our word for it.
Real boxes, real collections, and considerably more weight than we’d ever ask a sneaker box to carry alone.
@sbobsessor
Collector photos • Gifted product
1 / 6
“ALL NEW INDO SKELETONS!! SO GOOD I STAND ON IT! Literally.”
Shared by @sbobsessor after installing the FSR-MK.I in a well-loved Nike SB box.
@thesolesorcerer
Collector video • Gifted product
“Your sneakers are 10/10, but is your box a 2/10?”
@thesolesorcerer puts the support system through a proper collector demo.
View original reel on Instagram →Featured collectors received their FSR-MK.I products from Family Size Run. Posts and opinions are their own.
Choose your box size
The right fit. Nothing extra.
Purple / Sail / Rainbow SB era + Generic Orange boxes
Four finishes built around the classic 330 × 225 footprint.
Original White
OG Series
$24.99
The clean original. Disappears inside your box and keeps the stack standing tall.
Buy OG SeriesIn stock • Ships today or next business day
Real Red
F&F Edition
$29.99
A statement finish for collectors who want every detail—even the hidden ones—to hit.
Buy F&F EditionIn stock • Ships today or next business day
Translucent Clear
The Apparition
$24.99
Low-profile protection in a translucent finish that lets the structure speak for itself.
Buy The ApparitionIn stock • Ships today or next business day
Orange Peel
Orange Box
$24.99
Built 1 mm taller to match original Orange Box variant specs with a true factory fit.
Buy Orange BoxIn stock • Ships today or next business day
From our shop to your stack
In stock means ready to move.
If you can buy it here, it is on hand. Most domestic orders received before 5 PM ET ship the same business day; later orders typically move the following business day.
Fulfillment is powered by Gantry Cloud from FSR-Labs—shipping software we built to give every order the same care as the product inside it.
Ships today or tomorrow
In-stock orders leave our shop the same or next business day. If a surge changes that, we will communicate the lead time directly.
Domestic UPS & USPS
We ship within the United States through UPS and USPS. Transit is typically 5–7 days after your order processes.
Tracking that keeps up
Gantry sends branded email updates when your label is created, when your package is out for delivery, and when it lands.
Talk to real people
Don’t see your box?
Let’s build it.
Need a size we don’t carry yet—or just want to say hi? We’d genuinely love to hear from you.
For custom fits, send the shoe, box era, size, stamped dimensions, and a clear photo of the stamp inside the box. If the dimensions could serve other collectors too, your prototype may qualify for a significant development discount at our discretion.
Prefer email? Write us directly at help@familysizerun.com.
Your grails deserve the whole story.
Shoes, paper, box, accessories. Secured.