6 icons for "depth"

dimensions

stack-back

stack-backward

stack-forward

stack-front

stack-middle

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Phosphor

1,512 icons MIT

Simple Icons

3,397 icons CC0 1.0

Lucide

1,668 icons ISC

Phosphor Filled

1,512 icons MIT

Feather

Heroicons

Tabler

4,985 icons MIT

Meteocons