Muxing PCM audio into WMA increases file size significantly - ffmpeg

Question

While I am trying to convert wav file to wma file size is becomes much larger than original source file:
input.wav - 11M
output.wma - 16M
Is there any way to reduce file size of output file?
Command and output:
$ ffmpeg -i input.wav -c copy output.wma
ffmpeg version N-80797-g8b4d6cc Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 6.1.1 (GCC) 20160501
configuration: --enable-gpl
libavutil 55. 27.100 / 55. 27.100
libavcodec 57. 48.101 / 57. 48.101
libavformat 57. 40.101 / 57. 40.101
libavdevice 57. 0.102 / 57. 0.102
libavfilter 6. 46.102 / 6. 46.102
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 1.100 / 2. 1.100
libpostproc 54. 0.100 / 54. 0.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'input.wav':
Metadata:
encoder : Lavf57.40.101
Duration: 00:01:00.00, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
Output #0, asf, to 'output.wma':
Metadata:
WM/EncodingSettings: Lavf57.40.101
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, 1411 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
size= 16150kB time=00:01:00.00 bitrate=2205.1kbits/s speed=1.9e+03x
video:0kB audio:10336kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 56.255745%

Answer 1

WMA is crappy. Try changing the packet size. From FFmpeg ASF muxer documentation:
-packet_size
Set the muxer packet size. By tuning this setting you
may reduce data fragmentation or muxer overhead depending on your
source. Default value is 3200, minimum is 100, maximum is 64k.
Example:
ffmpeg -i input.wav -c copy -packet_size 65536 output_64k.wma
File sizes:
input.wav - 11M
output_64k.wma - 11M
output_default.wma - 16M