score:3

Accepted answer

you can change image size like below.

const imgstyle = {
  maxheight: 128,
  maxwidth: 128
}

<media object src={themes.image} style={imgstyle} alt={themes.name} />

note: react by default adds px to the numbers if we don't specify explicitly. here 128 is 128px

score:1

the list of props for media has classname so you can give a class in your css file like,

.my_image{
 height:100px;
 width:100px;
}

and use the media as,

<media object src={themes.image} alt={themes.name} classname='my_image' />

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