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John O'Callaghan

Hometown: Encinitas, California
Tradecraft: Knife Maker / Photographer
Website: Click here
Social: Instagram

John O'Callaghan, also known for OC Studios and OC Blades, is a custom knife maker and photographer based out of the San Diego area. He's a purebred New Yorker, where he worked as a crane rigger and mechanic to put himself through art school. Getting his start apprenticing for the Navy Seal run Half Face Blades, John quickly learned the craft of knife making and began creating blades in his own style soon after. In and out of the water, John can be caught with camera in hand shooting anything from ocean movement to street portraits of Hollywood's elite. A bit of a jack of all trades, John embodies the saying "be too complex to categorize."

Sizing and Fit


STRETCH FABRICS - Allows us to make an ergonomically designed and better performing pant that uses less fabric, meaning less chance of things getting caught on machinery or flapping in the breeze when you're riding your motorcycle to work.
MODERN FIT - All 1620 Workwear pants feature a modern fit. This means our waist fits true to size, slightly slim through the thigh, with plenty of room in the crotch and slightly tapered towards the hem. 

Pants Sizing Chart

WAIST MEASUREMENT - Use a measuring tape to measure around your waistline, just above the top of the hip bones. Make sure the tape is snug but not too tight.

INSEAM LENGTH - Grab a pair of pants that fit well and lay them flat on the floor. With a measuring tape, measure the length from the crotch to the bottom of the leg/hem. 


 When in doubt size up, but remember our waistbands stretch for more forgiveness than your traditional work pants.


Our hoodies, shirts and tees have a generous tradesman fit and are slightly longer in length than you may be used to, preventing any unwanted exposure.

Tops Sizing Chart