I carved a cross like this many years ago for my niece's wedding. I thought it was cool and now managed to model one up in Geomagic Design & 3D print it. Also the dimensions are nearly 19 units tall and 13 wide, so I printed it in inches at 0.15 scale. I've added "Cross loop small.stl" since it's only 3Mb and much more manageable. The original "Cross loop.stl" was closer to 60Mb.

This cross can be thought of as symbolizing Jesus' never-ending, infinite love for us as represented by the continual loop - and the fact that it's a cross and reminds us of the extent to which He was willing to go to save people who turned their backs on Him.