New Balance FuelCell Rebel v5 Sizing Guide: Does It Run Small or True to Size?

Fit Notes

ASICS Novablast 5

The Novablast 5 typically runs long and features a roomier, more stretchy upper. Because the Rebel v5 is built on a shorter last with a more locked-in performance fit, a half-size increase is required to achieve the same functional toe clearance.

Nike Air Force 1

The Air Force 1 is an oversized lifestyle sneaker where users often size down 0.5 for a comfortable fit. The Rebel v5 is a technical running tool with a significantly shorter longitudinal fit; a full size increase from your AF1 size is necessary to account for the abbreviated length and natural foot swelling during exercise.

Adidas Samba

The Samba is notoriously narrow and low-profile. While the Rebel v5 provides significantly more width, it is equally short in the toe box; therefore, even if the extra width is welcome, you must still size up by 0.5 to prevent the hallux from impacting the front of the shoe.

Saucony Endorphin Speed 4

Saucony generally follows a traditional true-to-size standard. Due to the specific length deficit in the New Balance last, runners transitioning from the Speed 4 typically require a half-size larger in the Rebel v5 to maintain a healthy thumb's width of space in the toe box.