Rim size : Square is 2.55''(65mm),Round is 3.15''(80mm) ;
Length : Square is 8'' to 18.3'',Round is 8.58'' to 18.9'' ;
Product advantages : 3D Mesh bag makes larger space to prevent fish and shrimps from getting scared and getting injured , round rim is suitable for catching fish and shrimps,square rim is good for skimming small debris from aquarium bottom .
