Two properties offer this functionality: 'min-height' Property name: 'min-height' Value: | | inherit Initial: 0 Applies to: all Inherited: no Percentage values: refer to parent's height Media groups: visual 'max-height' Property name: 'max-height' Value: | | inherit Initial: 100% Applies to: all Inherited: no Percentage values: refer to parent's height Media groups: visual These two properties allow authors to constrain box heights to a certain range.