Size

Three sizes are recognised, Regular, Medium and Small. The majority belong to the largest of the three, Regular; consequently, most of this guide concentrates on the black Regular size assortment. The black Medium size and coloured assortments are simplified assortments because they are compromised by quantity. Small sizes of all colours are downgraded to unlabelled of the grounds of value.

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Regular
over 33 centimetres

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Medium
under 33, over 26 centimetres

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Small
under 26 centimetres