Grab yourself an end of line bargain!
Handi-Step 2 plastic spa steps. Easy to build, no tools required, took me about 5mins max. Comes with one curve backed step and one straight backed step so you can decide which step goes on the top tier depending on whether your spa is straight or curve sided. Very sturdy to stand on.
Available in Light Grey only. Approx 72cm wide and 57cm deep when built