10KB is the file size of the photo and cannot be used as a basis for judging the photo size. So only 10KB can't judge the size of the photo.
The size of photos is usually in inches, 1 inch ≈ 2.54 cm.
Extended data:
According to the SI standard, 1KB = 1024b (bytes, bytes), while according to the IEC standard, 1KB = 1024 b. When buying broadband, operators often refer to Mbps, which is megabits per second. According to the conversion of 1b = 8b, the actual speed of 100Mbps broadband is 12.5 MB/s, and the accurate value is about11.92 MIB/s.
However, the photo of 10KB seems too small to see the characters clearly. The photo size of 100-200 KB is normal.