html sizes

px,%,vw,vh,em,rem px px to fixed hota hay ay depend karta hay screen to screen jasey uhd 4k ,8k may kya hota hay ek high dpi hota hay manlo ek box chota sa 5cm ka usmay bohot jyada px hogay aur koi baba ajam kay jamany ki screen hay to usmay 5 cm kay...