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Gear Loop

Ocun Ozone sizing

Size up about 1½ sizes from your street shoe

For a snug all-round fit, a street UK 9 (EU 43) is a UK 10½ (EU 45) in the Ozone. Go half a size smaller for hard bouldering, or bigger for long days. It's a starting point: feet differ, so try them on if you can.

Your size in the Ozone

Your street shoe size

UK9

Aggressive

Tight, hard bouldering

UK10EU 44½

Recommended

Snug all-rounder

UK10½EU 45

Relaxed

Long sessions

UK11EU 45½

Comfort

Beginners, multi-pitch

UK11½EU 46½
Your size in all 292 shoes

Ocun Ozone size chart

Your street size, then the size to get for each fit. From a standard UK/EU size chart and how this model runs.

Ocun Ozone size chart
StreetAggressiveRecommendedRelaxedComfort
UK 4EU 37UK 5EU 38UK 5½EU 38½UK 6EU 39½UK 6½EU 40
UK 4½EU 37½UK 5½EU 38½UK 6EU 39½UK 6½EU 40UK 7EU 40½
UK 5EU 38UK 6EU 39½UK 6½EU 40UK 7EU 40½UK 7½EU 41½
UK 5½EU 38½UK 6½EU 40UK 7EU 40½UK 7½EU 41½UK 8EU 42
UK 6EU 39½UK 7EU 40½UK 7½EU 41½UK 8EU 42UK 8½EU 42½
UK 6½EU 40UK 7½EU 41½UK 8EU 42UK 8½EU 42½UK 9EU 43
UK 7EU 40½UK 8EU 42UK 8½EU 42½UK 9EU 43UK 9½EU 44
UK 7½EU 41½UK 8½EU 42½UK 9EU 43UK 9½EU 44UK 10EU 44½
UK 8EU 42UK 9EU 43UK 9½EU 44UK 10EU 44½UK 10½EU 45
UK 8½EU 42½UK 9½EU 44UK 10EU 44½UK 10½EU 45UK 11EU 45½
UK 9EU 43UK 10EU 44½UK 10½EU 45UK 11EU 45½UK 11½EU 46½
UK 9½EU 44UK 10½EU 45UK 11EU 45½UK 11½EU 46½UK 12EU 47
UK 10EU 44½UK 11EU 45½UK 11½EU 46½UK 12EU 47UK 12½EU 47½
UK 10½EU 45UK 11½EU 46½UK 12EU 47UK 12½EU 47½UK 12½EU 47½
UK 11EU 45½UK 12EU 47UK 12½EU 47½UK 12½EU 47½UK 13½EU 49

What Ocun says

“Most climbers choose the same size as their street shoes, or half to one size down for a…”

Quoted from the Ocun product page

Specs

Rubber
Vibram, 4 mm
Asymmetry
strong
Stiffness
medium
Made for
bouldering, gym

More Ocun shoes

Ocun sizing →

Estimates. Fit depends on foot shape and preference.