What is half of an A4? That's an A5. In millimetres it is 148 mm x 210 mm, in cm 14.8 cm x 21 cm. In inches, an A5 is 5.8 x 8.3 inches.
Paper Sizes Explained
A4 to A5 - Save Half
Multicolor Diwali Rangoli Colors, For Festivals at Rs 20/kilogram
135gsm A5 4 Page Folded Leaflet A4 Half Fold Leaflet
Paper Sizes and Formats, the Difference Between A4 and Letter
IMPRINT A5 Size Copier Paper (Half of A4 Size) White, 70 GSM, 6
Superme A5 Copier Printing Paper 1 ream 200 half of A4 Sheets, NOT A4 Size, White
Superme A5 Copier Printing Paper 200 sheets, half of A4 Sheets, NOT A4 Size, White
Printable Note Paper 6 Different Designs of Lined Papers, Lined
Paper Sizes and Formats, the Difference Between A4 and Letter
Multicolor Diwali Rangoli Colors, For Festivals at Rs 20/kilogram
What Size is A4 paper?, Guide to Paper Sizes