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Green Cards

Green Cards

Regular price $39.99
Regular price $49.99 Sale price $39.99
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If you know the break, you will make more putts. Our Green Cards tell you EXACTLY how much your putts will break. Stop second-guessing your read and make more birdies with our Green Cards.


  • The Ultimate Putting Cheat-Sheet: Our Green Cards tell you exactly where you need to aim your putts for any given slope or green speed. Once you determine the slope of your specific putt, use your Green Card to find out how far outside the hole you should play it.
  • Built with Tour-Proven Data: Our Green Cards have been meticulously tested by top PGA professionals to ensure accuracy and reliability.
  • Use Alongside WhyGolf Slope Plate for Best Results: It's easiest to determine slope percentage by using your feet to feel the break. Your eyes lie to you - your feet won't. Our Slope Plate is the perfect tool for honing your green-reading skills using your feet, all within the comfort of your home.
  • One Year Money-Back Guarantee - Make more putts immediately or send it back, no questions asked.
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Make More Birdies in 3 Steps

Step 1: For any given putt, determine the slope percentage with your feet.
Step 2: Pace off the length of your putt.
Step 3: With these inputs, reference your Green Card for the exact break.

Use With Slope Plate For Best Results

Our Slope Plate will enable you to accurately and consistently detect slope on putting greens. Once you know the slope, our Green Cards will tell you the exact break.

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Customer Reviews

Based on 58 reviews

Love these cards. Really help!!

Solid Putting Aid

Really happy with this aid. I really do like the built in gates and the detachable rail system to get ligned up quick and easy.

Awesome to hear, Roland. Glad the Putting Thing is working out for you. Best, WhyGolf Team

Excellent putting aid

I have found this very useful in getter a smoother roll with the correct initial trajectory

Thanks Freddie, glad the Putting Thing is working out!
Best, WhyGolf Team

Denny Schroeder
Great putting aid

Super easy to use. I like the adjustments for ball and club. Great to use before a round to get dialed in.

Thanks Denny - awesome to hear. Best, WhyGolf Team

Young Chen

It improved my putting stroke tremendously

Green Cards FAQ's

How do the Green Cards work?

Green Cards are designed to be used on the golf course as you play. In a matter of seconds, you'll know exactly how much your putt will break.

Pair Green Cards with our Slope Plate for an unbeatable combination that trains you to read slopes with your feet accurately.

Why did we create the Green Cards?

We created the Green Cards to provide golfers with a definitive edge in precision putting. Recognizing that most golfers lack the time for extensive green-reading practice, our cards streamline the process, enabling accurate putt alignment based on specific green slopes and speeds.

Is the data on the Cards based on the assumption that putts will travel a specific distance past the hole?

Yes. Each data point assumes that the golfer will hit their putts 18" past the hole.

Are the Green Cards USGA legal?

The Green Cards are permitted under the USGA Rules of Golf.

Why are there 6 Green Cards?

You'll get one Green Card for each Stimp rating 8-13. Whenever you play, you'll pick the ONE Green Card that corresponds to the speed of the greens you're facing that day.

You'll easily be able to determine your green speed with the included Stimpmeter.

How will I know what card to use?

Your purchase includes a handy Stimpmeter, allowing you to measure the speed of the greens you play on. Once you know speed of the greens, pick the corresponding Green Card and you're ready to go.

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