If I wanted to put my curved soprano on an alto-tenor saxophone stand, I would have used the one I already have for my tenor at home. First time I've been genuinely disappointed in a Thomann purchase (despite being an extremely happy customer for years).
It has the exact same dimensions as my tenor stand - yes of course you can bend the hoop to fit the bell, but this thing is bigger than my actual soprano. Aesthetically it's ugly, pragmatically it does the bare minimum, it's heavy so there's zero point in doubling the weight of your travel case with it, and it's overpriced for what it is. (Only reason I bought it was I thought it was custom sized for the curved soprano. I should have read the reviews before this impulse purchase).
Rookie mistake on my part to try it but live and learn I suppose...