Adidas Forum Low
Sizing & fit guide
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Why the Adidas Forum Low fits this way
The Adidas Forum Low sits closer to true to size than the long-running terrace classics, with a slight snugness caveat. One wearer reports going down from their normal size and finding it tight: "I usually wear a 10.5 and picked up a pair of Forum Lows in a 10. They are good for a few hours but then as you walk" they get uncomfortable — i.e. sizing down from true was too small, confirming TTS is the right call. Another anchors it against Nike: "I have Forum mids in 11.5, Ultraboost in 11.5, my Air Max pair is" the same — placing the Forum at the same number as their other shoes.
The Forum's ankle strap and relatively stiff cupsole make it feel structured and a little clunky out of the box; the fit firms up around the midfoot and breaks in over the first wears. Width is medium — not as narrow as the Samba, but the strap can make the top of the foot feel snug for high insteps.
Net: true to size for standard feet. If you're between sizes, have wide feet, or a high instep, lean a half up rather than down — sizing down tends to run tight. The leather upper relaxes with wear.
Common scenarios
I wear US 10.5 in my normal sneakers. What size Forum Low?
US 10.5 — the Forum Low fits true to size. Don't size down (it runs snug); if you're between sizes or have wide feet, go up a half.
Do the Forum Lows fit like the Samba?
No — the Samba runs ½ long (size down), while the Forum is true to size and a bit snug. Keep your normal size in the Forum.
The strap makes the top of my foot feel tight. Normal?
The Forum's strap and stiff sole feel structured out of the box and break in. High insteps may prefer a half up; otherwise it relaxes with wear.
How it compares to other models
- Adidas Samba OG Low confidence
The Forum is TTS-to-snug; the Samba runs ½ long — don't size down the Forum like a Samba
- Adidas Ultraboost 5 Low confidence
Wearers report the same number in the Forum and Ultraboost
- r/Sneakers — Adidas Forum Low fitting question (TTS, snug if sized down)
- r/Sneakers — Air Max 90s vs Adidas Forum Low sizing
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