Trevor this catalogue gives the sizes of LMC & SMC objects.
Catalogue of extended objects in Magellanic Clouds (Bica+, 2008)
http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J%2FMNRAS%2F389%2F678
You can join the selected tables. If you type *NGC* in the names box it will list only the NGC objects.
NGCs 330, 346 and 371 are visible in 7x50 binoculars.