Elegant way to set element’s css width to fit ‘most’ of the content? by a regex pattern?

I have a <select> element, and <option> elements.

Rather than hardcoding the width to 90px, im looking for a way to set the width to fit a regex’d portion of the <option> contents

The preferred regex would be LOREMIPSUM#d{0,5}

In other words,

• is there a way for the max-width and min-width of the <select> to fit nicely around just the LOREUMIPSUM# part?
• I dont want the width of <select> to fit all the content, just the first part by that regex pattern.

    <select 
        id="someId" 
        name="someName" 
        class="someClass" 
        size="1" 
        onchange="someMethod();" 
        style="width:90px;">
            <option value="a0D3u00000BhNCxEAN">LOREMIPSUM#0263 abcabcabcabcabcabcabcabcabcabcabcabc</option>
            <option value="a0D3u00000Bh7qFEAR">LOREMIPSUM#0262 user tests</option>
            <option value="a0D3u00000BgovaEAB">LOREMIPSUM#0258 dogs</option>
            <option value="a0D3u00000BgovVEAR">LOREMIPSUM#0257 cats</option>
            <option value="a0D3u00000BgovVEAR">LOREMIPSUM#10000 some text</option>
    </select>