영어고수님께 질문! spick and span 이라는 표현

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spick and span 이라는 표현이요..
각각 단어를 찾아봐도 안나오는데
어떻게 뜻이 매우 깨끗한 이 되었을까요?
혹시 유래나 뜻이 나오게 된 배경이 있을까요?

[전]

영어고수는 아니지만. 저 표현은 알아요(노팅힐에서 휴그랜트 대사에) 저두 궁금해서 찾아보니 1930년대 미국에서 가장 잘 나가는 가정용 세제 이름이랍니다.

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위키피디아 참조
The phrase "span-new" meant as new as a freshly cut wood chip, such as those once used to make spoons. In a metaphor dating from at least 1300, something span-new was neat and unstained.

Spick was added in the 16th century, as a spick (a spike or nail) was another metaphor for something neat and trim. The British phrase may have evolved from the Dutch spiksplinter nieuw, "spike-splinter new".[1] In 1665, Samuel Pepys used spicke and span in his famous diary. The "clean" sense appears to have arisen only recently