I am new to latex and am trying to create the following in latex:

It looks similar to what I want when I use this:
$\scriptsize 0_{{\big T}{\small 1}} =
However, I get the following error message:
! Missing delimiter (. inserted).
<to be read again>
T
l.10 $\scriptsize 0_{{\big T
}{\small 1}} =
I was expecting to see something like `(' or `\{' or
`\}' here. If you typed, e.g., `{' instead of `\{', you
should probably delete the `{' by typing `1' now, so that
braces don't get unbalanced. Otherwise just proceed.
Acceptable delimiters are characters whose \delcode is
nonnegative, or you can use `\delimiter <delimiter code>'.
I am not sure how to fix the error and am hoping someone on here can help me :)

\bigdoes not change the font size in math mode but is used for delimiters like{or)... – leandriis Jun 05 '19 at 14:47\documentclass{article} \begin{document} $ ^0T_1 = $ \end{document}give the desired output? https://i.stack.imgur.com/7UhO8.png – leandriis Jun 05 '19 at 14:49\bigmust be followed by a delimiter; it doesn't change the size of arbitrary symbols. What do you need, precisely? – egreg Jun 05 '19 at 14:49\Bigbeing an error, the text size changes such as\scriptsizeand\smallshould not be used in math mode (they give a warning and do not work as you might expect) – David Carlisle Jun 05 '19 at 14:53