user standalone 10bp,margin=1bp \usepackage[T1]{fontenc} inputenc utf8 delimiters \downarrow ↓ true \Downarrow ⇓ true [ [ true ] ] true \langle ⟨ true \rangle ⟩ true | | true \| ‖ true \lceil ⌈ true \rceil ⌉ true \uparrow ↑ true \Uparrow ⇑ true \lfloor ⌊ true \rfloor ⌋ true \updownarrow ↕ true \Updownarrow ⇕ true ( ( true ) ) true \{ { true \} } true / / true \backslash \ true \lmoustache ⎰ \left \lmoustache \right. true \rmoustache ⎱ \left \rmoustache \right. true \lgroup \left \lgroup \right. ⟮ true \rgroup \left \rgroup \right. ⟯ true \ulcorner ⌜ true amssymb \urcorner ⌝ true amssymb \llcorner ⌞ true amssymb \lrcorner ⌟ true amssymb \arrowvert \left \arrowvert \right. │ true \Arrowvert \left \Arrowvert \right. ║ true \bracevert \left \bracevert \right. ┃ true \lvert ⎸ true amsmath \rvert ⎹ true amsmath \lVert ⎸⎸ true amsmath \rVert ⎹⎹ true amsmath