Welcome to the forum, Jim
As you can see, your photo could have been at least three times as large. Maybe the problem was not its dimensions but the file size (1 MB limit).
Actually you can post pictures up to 1280X1280 pixels, although 1024 seem to be more adjusted to the screens.
The picture you posted was 320X240. Quite a pity, as your crossbow became so less visible.
... and feel free to post as much info as you have available