To match "no more", you have to add the beginning anchor as well: 
my $re = qr/^\S{8}$/;

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لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: End of String in qr// expression by choroba
in thread End of String in qr// expression by gg48gg

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