$sizes: (
            xxs: .2cm,
            xs: .4cm,
            s: .6cm,
            m: .7cm,
            l: .8cm,
        );

        @each $s, $h in $sizes
        {
            &--#{$s}
            {
                td
                {
                    height: #{$h}cm; 
                }
            }
        }