I think a 1" side on a suit would be inappropriate - it more a 'bikini' than a serious swimsuit.  The brief water polo suits many if us admire on guys are usually 2", most Speedo/TYR swimsuits are 3".  Either style would be fine for lap swimming, in my humble opinion. 
		
	
		
		
		
		
		
	
		
		
	
	
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