My output of command is like:

```
File Size                       : 23 kB
File Size                       : 9.8 kB
File Size                       : 9 kB
File Size                       : 128 kB
File Size                       : 921.8 kB

```

How to extract from this to this:

```
23kB
9.8kB
9kB
128kB
921.8kB

```

I tried to use sed with command

```
sed 's/^..................................//'

```

output is

```
23 kB
9.8 kB
9 kB
128 kB
921.8 kB

```

and in this point my knowledge about sed and regex is end.
How to do that?