Tubing size for pump Grove Smart Plant Care Kit for Arduino

What is the tubing size for the 12 V DC pump in the Grove Smart Plant Care Kit for Arduino?

Thank You.

The tube size should fit G1/4 standard size.

Thank you for the response.

I have two different 1/4" tubing. One fits the water flow fine but doesn’t fit the pump. The other fits the pump fine but doesn’t fit the water flow. When I lookup G1/4 I see this: 3/8" ID 5/8" OD. This would seem to fit the pump but not the water regulator. Can you point me to a supply that is the correct tubing?

Can someone help me on this question? I am not finding tubing that will fit both the pump and the flow regulator that is in this kit.