How to make an organic shape?

Hi all,

I'm a SolidWorks beginner, and I need to make a part similar to the shape in the pic for an important uni project. I've got the model, but not the accurate dimensions cos the shape is quite organic. I tried a few different surface tools in SolidWorks, but I didn't even manage to get close to it. Does anybody know what's the best way to make it (if it's possible at all)? I'm lost. Please help me....!

Cheers,

Sarah

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