  We show that fixed dimensional klt weak Fano pairs with alpha-invariants and
volumes bounded away from $0$ and the coefficients of the boundaries belong to
the set of hyperstandard multiplicities $\Phi(\mathscr{R})$ associated to a
fixed finite set $\mathscr{R}$ form a bounded family. We also show
$\alpha(X,B)^{d-1}\mathrm{vol}(-(K_X+B))$ are bounded from above for all klt
weak Fano pairs $(X,B)$ of a fixed dimension $d$.
