 The size of a burn is measured as a percentage of total body surface area ( TBSA ) affected by partial thickness or full thickness burns . First @-@ degree burns that are only red in color and are not blistering are not included in this estimation . Most burns ( 70 % ) involve less than 10 % of the TBSA . 
 The size of a burn is measured as a percentage of total body surface area ( TBSA ) affected by partial thickness or full thickness burns . First @-@ degree burns <a href='null_relcl' title='1'><mark>that</mark></a><a href='drop_aux' title='2'><mark>are</mark></a>only red in color and are not blistering are not included in <a href='None' title='3'><mark>this</mark></a><a href='negative_concord' title='4'><mark>estimation</mark></a> . Most burns ( 70 % ) involve less than 10 % of the TBSA . 
Da size of a burn is measured as a percentage of total body surface area ( TBSA ) affected by partial thickness or full thickness burns . First @-@ degree burns only red in color and ain't blistering ain't included in no estimation . Most burns ( 70 % ) involve less than 10 % of the TBSA .