100 pieces of non-resealable outer sleeves for 10" and 78 rpm records. Dimensions: 10.7 in X 10.7 in, 27 cm X 27 cm, no flap.  We import these directly from Japan, no middleman. As far as we can tell, these are only made in JPN. Accept no substitutes.

270mm (across the opening) x 270mm (no flap)