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Boys measuring on a height chart

One Simple Rule

One Simple Rule is a family run business, focussing on creating bespoke , handcrafted and personalised solid wood Height chart rulers.

Where it all began.....

Hi, I'm Gav, daddy of Hendrick, husband to Hannah and the founder of One Simple Rule.

At One Simple Rule, we have one simple aim- to provide a personal, bespoke service creating simple, handcrafted, solid wood home decor for families to cherish forever.

So where did it all begin? My little boy, Hendrick, was born on Christmas day 2018. To say he has turned my world upside down is a massive understatement and I absolutely love being a dad, as difficult as it is sometimes!

A year later, while we were planning for Christmas 2019, Hannah bounded through our front door full of excitement. She had seen a wooden height chart ruler at our local garden centre perfect for our little Hendrick! I thought this was a great idea and when I saw it I could see where she was coming from - it was unique that was for sure, but it wasn't as special as I knew it could be. So (and I’m not quite sure what possessed me) I offered to make one instead.

I wanted to make it personal to us as a family. I wanted it to be much better quality, a more natural finish and I wanted it to look like the rulers I remember using at school! Hannah agreed, so I got to work and 3 weeks later yes, 3 weeks I had made my very first ruler by hand - the original One Simple Rule. It might have been slightly wonky and a bit patchy but it was a giant personalised ruler nonetheless. Little did I know this would be the beginning of the amazing adventure it's been so far.

And here we are. One Simple Rule Ltd has been officially launched and the feedback we have had so far has been incredible!

Enjoy having a look around. If you have any questions, we would love to hear from you.


The Dobson family with a height chart rulerFather and son enjoying natureHendrick measuring up against wooden height chart

Like this partner?


  • "What an incredible company. I purchased a gift from the US for my great nephew in England. Their customer service is exceptional and the product is so special!! Thank you ??????"
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    Claire Hester

  • "Amazing customer service from seller who communicated quickly and did all they could to help. Ruler received quickly and is absolutely stunning in my kitchen, just need to mark everyone on it now. Thanks ever so much."
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    Erin Quine

  • "I am floored as to how fast I received this to the United States. Beginning to end with customer service, attention to notes, packaging and quality of craftsmanship ship, 5 star!!!! I would highly recommend and definitely return to purchase in the future."
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    Gina Boyd

  • "We were absolutely delighted with the ruler - something we can keep for years to come. Especially loved the shape (like an old style ruler) There are many other ones online but we chose One Simple Rule for this unique feature."
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    Jennifer Cobb


FREE within UK through a fully tracked & insured courier UPS. We also offer competitive delivery prices worldwide.

We normally allow a 2-week-turnaround for all our handmade, personalised products. Need it sooner? Let us know and we’ll do everything we can meet your deadline.

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Please see's delivery policy.


Please see's returns policy.

Returns Address

28 Kestrel Close, Carterton, Oxon, OX18 3LS, GB

Terms and Conditions

We accept returns for items damaged in transit or if you receive a wrong order. Unfortunately, we cannot accept returns for personalised products which do not fall into the above category.

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Please see's terms & conditions.