O.T. Pro - Gray
EASY SIZING
If you have ordered boots with us previous to this date and enjoy your fit, you don't need to change a thing! Continue to order the same size, you can confirm via the size stamp in your boots or via your order.
See FAQ below to read more about the history of JK Sizing
Feel free to email general@jkboots.com or call with any questions!
Finding your size is super simple! If you are new to JK boots, get ready for an incredible boot experience. Take a couple minutes and follow the steps below to find your JK size. Keep in mind that the quality of the materials and construction of our boots is one of a kind, which means your boots will form to your feet over time, eliminating small sizing differences. So really, you can't mess this up!

STEP 1

STEP 2
Find your width: use a tailors tape to measure around the ball of the foot (widest boney part of the foot).

STEP 3
Find your JK size on the sizing chart!
FIND MY SIZE
Ball | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14 | 14.5 | 15 | 15.5 | 16 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
A | 7 3/8" | 7 1/2" | 7 5/8" | 7 3/4" | 7 7/8" | 8" | 8 1/8" | 8 1/4" | 8 3/8" | 8 1/2" | 8 5/8" | 8 3/4" | 8 7/8" | 9" | 9 1/8" | 9 1/4" | 9 3/8" | 9 1/2" | 9 5/8" | 9 3/4" | 9 7/8" | 10" | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | |
B | 7 5/8" | 7 3/4" | 7 7/8" | 8" | 8 1/8" | 8 1/4" | 8 3/8" | 8 1/2" | 8 5/8" | 8 3/4" | 8 7/8" | 9" | 9 1/8" | 9 1/4" | 9 3/8" | 9 1/2" | 9 5/8" | 9 3/4" | 9 7/8" | 10" | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | 10 5/8" | 10 3/2" | |
C | 7 7/8" | 8" | 8 1/8" | 8 1/4" | 8 3/8" | 8 1/2" | 8 5/8" | 8 3/4" | 8 7/8" | 9" | 9 1/8" | 9 1/4" | 9 3/8" | 9 1/2" | 9 5/8" | 9 3/4" | 9 7/8" | 10" | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | 10 5/8" | 10 3/4" | 10 7/8" | 11" | |
Narrow | D | 8 1/8" | 8 1/4" | 8 3/8" | 8 1/2" | 8 5/8" | 8 3/4" | 8 7/8" | 9" | 9 1/8" | 9 1/4" | 9 3/8" | 9 1/2" | 9 5/8" | 9 3/4" | 9 7/8" | 10" | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | 10 5/8" | 10 3/4" | 10 7/8" | 11" | 11 1/8" | 11 1/4" |
Regular | E | 8 3/8" | 8 1/2" | 8 5/8" | 8 3/4" | 8 7/8" | 9" | 9 1/8" | 9 1/4" | 9 3/8" | 9 1/2" | 9 5/8" | 9 3/4" | 9 7/8" | 10" | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | 10 5/8" | 10 3/4" | 10 7/8" | 11" | 11 1/8" | 11 1/4" | 11 3/8" | 11 1/2" |
Medium | 2E | 8 5/8" | 8 3/4" | 8 7/8" | 9" | 9 1/8" | 9 1/4" | 9 3/8" | 9 1/2" | 9 5/8" | 9 3/4" | 9 7/8" | 10" | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | 10 5/8" | 10 3/4" | 10 7/8" | 11" | 11 1/8" | 11 1/4" | 11 3/8" | 11 1/2" | 11 5/8" | 11 3/4" |
Wide | 3E | 8 7/8" | 9" | 9 1/8" | 9 1/4" | 9 3/8" | 9 1/2" | 9 5/8" | 9 3/4" | 9 7/8" | 10" | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | 10 5/8" | 10 3/4" | 10 7/8" | 11" | 11 1/8" | 11 1/4" | 11 3/8" | 11 1/2" | 11 5/8" | 11 3/4" | 11 7/8" | 12" |
4E | 9 1/8" | 9 1/4" | 9 3/8" | 9 1/2" | 9 5/8" | 9 3/4" | 9 7/8" | 10" | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | 10 5/8" | 10 3/4" | 10 7/8" | 11" | 11 1/8" | 11 1/4" | 11 3/8" | 11 1/2" | 11 5/8" | 11 3/4" | 11 7/8" | 12" | 12 1/8" | 12 1/4" | |
XWide | 5E | 9 3/8" | 9 1/2" | 9 5/8" | 9 3/4" | 9 7/8" | 10" | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | 10 5/8" | 10 3/4" | 10 7/8" | 11" | 11 1/8" | 11 1/4" | 11 3/8" | 11 1/2" | 11 5/8" | 11 3/4" | 11 7/8" | 12" | 12 1/8" | 12 1/4" | 12 3/8" | 12 1/2" |
6E | 9 5/8" | 9 3/4" | 9 7/8" | 10" | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | 10 5/8" | 10 3/4" | 10 7/8" | 11" | 11 1/8" | 11 1/4" | 11 3/8" | 11 1/2" | 11 5/8" | 11 3/4" | 11 7/8" | 12" | 12 1/8" | 12 1/4" | 12 3/8" | 12 1/2" | 12 5/8" | 12 3/4" | |
7E | 9 7/8" | 10" | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | 10 5/8" | 10 3/4" | 10 7/8" | 11" | 11 1/8" | 11 1/4" | 11 3/8" | 11 1/2" | 11 5/8" | 11 3/4" | 11 7/8" | 12" | 12 1/8" | 12 1/4" | 12 3/8" | 12 1/2" | 12 5/8" | 12 3/4" | 12 7/8" | 13" | |
8E | 10 1/8" | 10 1/4" | 10 3/8" | 10 1/2" | 10 5/8" | 10 3/4" | 10 7/8" | 11" | 11 1/8" | 11 1/4" | 11 3/8" | 11 1/2" | 11 5/8" | 11 3/4" | 11 7/8" | 12" | 12 1/8" | 12 1/4" | 12 3/8" | 12 1/2" | 12 5/8" | 12 3/4" | 12 7/8" | 13" | 13 1/8" | 13 1/4" |
WHAT SHOULD I EXPECT
JK's handmade leather boots are unlike anything you have put on your feet before. Because we use the highest quality materials and construction, your boots will form to your feet over time, for the perfect fit.
Your boots may feel a little stiff or strange at first, and that is completely normal. The leather will settle to your feet: stretching, where there is tightness, and shrinking up where there is extra room. The insoles will form to your arches and toes, and the boots will soften and mold to your foot and calf.
Wear with a good pair of socks, trust the break in process, and enjoy a whole new level of footwear!
Brief history with JK Sizing
We are continuing to improve sizing experience for new customers based on current customer feedback to achieve the best results.
From our early days, JK Boots has been on a journey to improve our products, systems, customer experience, and methods. We never want to settle for good enough, we always want to get better!
As of March 2023, based on the market research, specialist consultation and customer feedback, we have updated our sizing method and chart, in order to increase the ease and simplicity in finding the best size for you.
This includes:
• Offering a larger variety of letter Widths
• Simplifying Boot Length determination Via the US Brannock device and Standard U.S Sizing
• Offering the Ball width Measurements chart
• Adding a printable Brannock Device & Tape Measure
• Adding a conversion Calculator
How Much Toe Room Should My Boots Have?
•Our "standard" toe room is based off of what we typically recommend–giving you about a thumb's width of space between your toe and the end of the boot. This leaves plenty of room for your foot as the leather settles, and shrinks back (curling the toes slightly) over time. With that in mind, everyone is different. You know your feet best, and should pick what sounds good to you, like if you know you have sensitive toes, go with a roomy fit, or if you prefer less material up front, than go with the snug fit.
How Wide Should My Boots Be?
Our boots are built to provide incredible support and comfort for extended periods of time, almost like a firm handshake. We have five widths to choose from (D (narrow), E (regular), EE (medium), 3E (wide), and 5E (Xtra-Wide), so simply select what sounds right.
The O.T. PRO displays the same lightness and flexibility as our O.T., but with a stronger fire/chemical grade sole, allowing you to move with ease from the mountains to the city. The dual sport boot offers an impossible balance of agility, traction, and support for on and off the grid. We’re not worried when the road ends. We’ll build our own.
Specifications
- Shaft Height - 8"
- Uppers - Smooth 8oz premium oil-tanned leather
- Lowers - Roughout 8oz premium oil-tanned leather
- Thread - high strength, Technora® fire resistant over 900 °F
- Hardware - traditional brass high quality eyelets and speed hook combo
- Insole - genuine oak tanned leather
- Midsole - genuine oak tanned leather
- Arch support - leather
- Sole - Vibram RedX
- Origin - Handmade in the USA
Exchanges & Returns
30 Days to Exchange or Return Clean Boots - Learn More
- Your boots are secure every step of the way with Fast shipping and Signature Confirmation!
- In the Box: Boos, laces, tongue guards, and oil
- Complimentary Manufacturer's Warranty
The O.T. PRO displays the same lightness and flexibility as our O.T., but with a stronger fire/chemical grade sole, allowing you to move with ease from the mountains to the city. The dual sport boot offers an impossible balance of agility, traction, and support for on and off the grid. We’re not worried when the road ends. We’ll build our own.
Specifications
- Shaft Height - 8"
- Uppers - Smooth 8oz premium oil-tanned leather
- Lowers - Roughout 8oz premium oil-tanned leather
- Thread - high strength, Technora® fire resistant over 900 °F
- Hardware - traditional brass high quality eyelets and speed hook combo
- Insole - genuine oak tanned leather
- Midsole - genuine oak tanned leather
- Arch support - leather
- Sole - Vibram RedX
- Origin - Handmade in the USA
Exchanges & Returns
30 Days to Exchange or Return Clean Boots - Learn More




- Jacob c.ReviewingO.T. 6" (Safety Toe) - BrownI recommend this productAge Range 25 - 34Weekly hrs spent in boots 50-60Occupation TechnicianWhat I love about JK Durability, Comfort, Made in USARated 5 out of 5 stars5 days agoRefer life
Had these boots for closer to 6 months now. I work in the field of commercial, industrial, maritime and offshore hvac and refrigeration. These boots take a beating and keep going. They did take some time to break in but not as bad as my ****** boots. Went with smooth uppers and roughout bottoms. These are a dream to wear. These have gotten soaked and dried out fairly quickly. Accidentally ordered the 6in but I’ve loved them. They did have some cosmetic issues but that didn’t faze me. I knew I’d be beating on them. Will be getting a second pair eventually.
Was this helpful? - Jason S.Verified BuyerReviewingO.T. Bison (Smooth)I recommend this productAge Range 45 - 54Occupation OtherWhat I love about JK Quality Craftsmanship, Custom Build, Made in USA, Old World Craftsmanship, UniqueRated 5 out of 5 stars1 week agoAmazing quality and style
These are by far (I own White's, Danner and two pairs of Thorogood) the best quality boots I've ever owned. Simply gorgeous leather and bullet proof construction. I could not be more pleased with my purchase. They're almost too handsome to get dirty.
Was this helpful? - Terry T.Verified BuyerReviewingO.T. Pro (Safety Toe) - BrownI recommend this productAge Range 55 - 64Weekly hrs spent in boots 40-50Occupation ElectricianWhat I love about JK Quality Craftsmanship, Durability, Made in USA, Old World Craftsmanship, Long-lastingRated 5 out of 5 stars2 weeks agoAwesome boots
Placed my order and received them in 3-weeks. Little break-in is correct. Wore them to work ,nine hrs on cement floors , the next day and every day since. Heavy boots at over 3-pounds each, I don’t even notice it when I have them on. They are like leather armor for my feet. The red X soles are hard,but they are chemical resistant. So if that wasn’t necessary I would get the honey soles. Well worth the money, wish I had bought them years ago. I wasted a lot of money on Thorogoods and the likes.
Was this helpful? - Marcus S.Verified BuyerReviewingO.T. Pro - BrownI recommend this productAge Range 35 - 44Weekly hrs spent in boots 60+Occupation OtherWhat I love about JK Quality Craftsmanship, Customer Service, Comfort, Durability, Made in USARated 5 out of 5 stars2 weeks agoHands down the absolute best communication and quality
The boot is perfect for what I do, boat captain for environmental recovery, and landscape installer. We do a little bit of everything, from massive water features, heavy equipment operation to shovel work. These boots are as versatile as I am and the quality is beyond expectations. I would normally blow through a pair of danners in 4 months and in one month they would already show significant signs of wear. I have these for two weeks and they broke in with no hot spots or blisters. Follow the sizing instructions and you will love them like I do.
Was this helpful? - Adam W.Verified BuyerReviewingO.T. Pro (Safety Toe) - RedwoodI recommend this productAge Range 25 - 34Weekly hrs spent in boots 50-60Occupation WeldingWhat I love about JK Quality Craftsmanship, Customer Service, Durability, Comfort, Custom BuildRated 5 out of 5 stars3 weeks agoTough boots
These have survived 3 weeks at the steel mill welding/fabricating heavy equipment 10-13hrs a day. Not one stitch frayed or popped. Tough boots for one of the harshest environments you can put boots in.
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