Japan アイアンハート

Iron Heart jeans: size charts & fit guide

Founded by Shinichi Haraki. Known for heavyweight 21oz denim built to survive motorcycle miles.

Does Iron Heart run true to size?

Going by the published charts, Iron Heart runs true to size. For a 32″ waist we’d pick a tag 32 in 4 of 8 models. That aims for a waistband at your waist after the first soak: selvedge gives about an inch with wear.

Your waist	Tag we’d pick	In
30″ (76 cm)	30	4 of 8 models
32″ (81 cm)	32	4 of 8 models
34″ (86 cm)	34	5 of 8 models
36″ (91 cm)	36	5 of 8 models

Waists measured around your body where your jeans sit. Raw, unsanforized charts are adjusted for their first soak. Each model below shows its own pick for your waist.

Iron Heart size chart at a glance

Units

in cm

Measurements in the size that fits a 32″ waist. Open a model for its full chart in every size.

Model	Fit	Size	Waist	Front rise	Thigh	Knee	Opening	Fabric
IH-634S	Straight	31	81.3 cm	26.7 cm	31.1 cm	22.2 cm	20.3 cm	14–21
IH-555S	Slim Straight	31	81.3 cm	26 cm	29.8 cm	19.7 cm	18.4 cm	14–21
IH-666S	Slim Straight	32	81.3 cm	26 cm	29.2 cm	21 cm	20.3 cm	14–21
IH-888S	Relaxed Tapered	32	81.3 cm	28.6 cm	31.8 cm	22.2 cm	19.7 cm	14–21
IH-633S	Tapered	32	81.3 cm	27.3 cm	29.8 cm	22.2 cm	19.1 cm	14–21
IH-1955S	Tapered	32	81.8 cm	32 cm	32 cm	24.1 cm	20.3 cm	14
IH-301 (BSPIH25-301)	Slim Tapered	33	80 cm	28.4 cm	29.2 cm	20.3 cm	18.5 cm	19
IH-777S	Slim Tapered	31	81.3 cm	24.8 cm	27.9 cm	19.7 cm	17.8 cm	14–25