Ever had that necklace or bracelet which is just too short to sit comfortably around your neck or wrist? Have you thought about necklace or bracelet extenders. These can extend a chain from between 2" and 4" and can either add a new dimension to your necklace it make your chain more comfortable to wear. You just clip them to your existing chain's clasp. Making a chain longer can also make it easier to fasten as there is more to grip.
I found some very reasonably priced brass, sterling silver and gold ones and Amazon - £2.30 for a single sterling silver necklace extender to £9.99 for a set of brass necklace and bracelet extenders in silver and gold tone.
A set of bracelet / necklace extenders: https://www.amazon.co.uk/gp/aw/d/B013OWRS7I/ref=mp_s_a_1_1?ie=UTF8&qid=1473890626&sr=8-1&pi=SY200_QL40&keywords=necklace+extender&dpPl=1&dpID=41QHDsoh1BL&ref=plSrch
Sterling silver extender 2- 4 inches (price varies) https://www.amazon.co.uk/gp/aw/d/B00UAQ6B6G/ref=mp_s_a_1_7?ie=UTF8&qid=1473890753&sr=8-7&pi=AC_SX236_SY340_QL65&keywords=necklace+extender&dpPl=1&dpID=41pmLpFspZL&ref=plSrch#mobile-twister_item_display_length_1473890775425