Inspect and check the class for input text and try this:
    jQuery('.InputText').css('min-height','30px');
    jQuery('.InputText').css('max-width','160px');
    jQuery('.InputText').css('margin-top','0px');
    jQuery('.InputText').css('height','30px');
                
     
                                    
            	Inspect and check the class for input text and try this:
	    jQuery('.InputText').css('min-height','30px');
	    jQuery('.InputText').css('max-width','160px');
	    jQuery('.InputText').css('margin-top','0px');
	    jQuery('.InputText').css('height','30px');
	 Thanks for your comment. Upon inspection it looks like the class changed to text-input for new survey experience. 
Tweaking the jquery .css you provided does alter the dimensions of the text box but the other jquery line I originally posted altered to text-input still does not appear to be doing anything. 
 
Qualtrics.SurveyEngine.addOnload(function()
{
	jQuery('.text-input').css('min-height','30px');
    jQuery('.text-input').css('max-width','160px');
    jQuery('.text-input').css('margin-top','0px');
    jQuery('.text-input').css('height','30px');
	jQuery('#'+this.questionId+' .text-input').attr('maxlength','10');
});
 
                
     
                                    
            @b.dylan ,
Can you try without questionid, simply
jQuery('.text-input').attr('maxlength','10');
 
                
     
                                    
            	@b.dylan ,
	Can you try without questionid, simply
	jQuery('.text-input').attr('maxlength','10');
	 
	 Yes, that works, thank you so much!