Changing Quantity box length

https://fabricmoodsonline.co.za/product/apples-linen-panama-cotton-400244-150cm/

Hi there,

Would like to update you that the query asked by you is not related to the Smart Manager plugin.

Further, the issue faced by you, by adding the below CSS code blocks in your child theme CSS file.

select.spq_dropdown{
     width: auto !important
     margin-right : 1rem;
}

div.quantity{
    display: none !important
}