Was an emergency order ... fast delivery was necessary

My Child 2 Years had pneumonia and during all pharmacies have up to 3 days and longer delivery time for twice the price in the area, I ordered this product.

In young children, you have to take the Daume to measure.
That was when our toddler though marginal, but the thumb was still long enough.

We have so far made no direct reference measurement with calibrated medical equipment.

But with the measurement results to the pediatrician, who was a few hours old, the results have met +/- 1%.