One tenth a teaspoon is a pinch. Ever heard of "A pinch of cinnamin"? Kinda like that.
If you do not have a means to meaure quantities accurately, you can still estimate. But bear in mind, measuring cups are not expensive. They're pretty easy to get.
NO, 5 ml equals a teaspoon.
If you have a 1 ml measuring spoon.
Vanilla extract is liquid, so use measuring spoons to measure it, or for large quantities use a measuring cup for liquids. Vanilla powder can be measured with measuring spoons or a measuring cup for solids. Whole bean vanilla doesn't usually need a measuring device, since the recipe will say something like "seeds of 1 whole vanilla bean."
Iced tea spoons in most flatware patterns have smaller bowls than that same pattern's tea spoons.Further, neither an iced tea spoon nor a tea spoon is a teaspoon measure, nor are they intended to be. If you need a teaspoon (as in a recipe), that means to use a measuring spoon, not a piece of arbitrarily-sized flatware.
to measure
1.25ml is a quarter of a teaspoon
A measuring spoon is frequently used to measure ingredients when cooking.
Measure weight with a spoon?
1/6th of a teaspoon but damned if I can find a measuring spoon that small.
measuring spoon
0.6ml. To judge the amount without a measuring spoon, it's less than 1 millilitre but more than half a milliter