Comparison of the ALMA 870 μm morphological properties to the NIRCam F444W morphologies for the subset of SMGs with high-resolution ALMA observations from Gullberg et al. (2019). We compare (a) the half-light radii and (b) the position angle as a function of axis ratio, with a running median (blue line and shaded region) shown in each panel. On average we identify significantly smaller 870 μm sizes ($R_{\mathrm{h}}^{\mathrm{F}444\mathrm{W}}/R_{\mathrm{h}}^{870\mathrm{\mu }\mathrm{m}}$ = 2.7 ± 0.4) but consistent axis ratios (b/a_F444W / b/a_870 μm  = 0.95 ± 0.11) and position angles (PA_F444W − PA_870 μm  = 17 ± 5°), with a larger offset in position towards more circular axis ratios where the position angle is more degenerate.