Decimal Metafield - Specify number of decimal places (X.XX)

[kdb1]

I need a decimal Metafield in my store to store to display the weight of an item in a unique format (not g, oz, lb etc). I always want the number to display 2 decimal places (x.xx) but if I enter a whole number, it removes the decimal places. Does anyone know how to do this?

Here is an example:

Metafield Value = 1.00

The way it defaults is back to = 1

I always want it to display two numbers after the '.'

[MastersHub]

You should choose the decimal type. Enter the minimum and maximum values.

[kdb1]

It looks like that would only allow me to set a MAXIMUM decimal places value. I need a MINIMUM decimal places value. 

Currently, if I enter '2.00', it defaults back to '2' - I want it to display 2.00.