Something old, something new......

"Something old" represents continuity with the bride's family and with the past. 

"Something new" symbolises optimism and hope for the bride's new life ahead.

"Something borrowed" from someone whose own good fortune in marriage may carry over to the new bride. 

"Blue" used to be a popular colour for the wedding gown itself.
"Marry in blue, lover be true."

"a Silver Sixpence" is for wealth and financial security and should be slipped into the left shoe.

Left: Half-Silver Sixpence of 1945 (George VI)
Right: Copper-nickel Sixpence of 1967 (Elizabeth II)

All Sixpences are silver in colour, but the make-up of their silver content ranges through solid silver, half silver to no "real" silver at all!
Silver Sixpences were first introduced by our Royal Mint in the reign of Edward VI in 1551. They continued to be struck as full silver coins until 1920.
From 1920 to 1946 they were produced as half-silver coins. From 1947 onwards the humble sixpence was made from copper-nickel. The last sixpence was struck in 1967 in preparation for decimalisation in 1971.