This bag fits the Baby Spider, sure.
But I’ve never been impressed with the K&M carry bag quality. The fabric is medium weight and the zippers feel like they will die one day.
And most annoyingly, the baby spider is weighted more heavily down one end, meaning the carry straps don’t balance it at all!
The result is the bag ends up vertical more often than not, hurting my shoulder and putting extra strain on the stitches.
Small carry handle straps would be a nice addition, but they are not on this product.
I’d look for alternative bags, even if this bas is a perfect fit.