The Topper is an 11 foot (approx. 3.3m) sailing dinghy designed by Ian Proctor. The Topper was a one-design boat until 2023 when a new version was produced, and is sailed mostly around the British Isles. It was recognised as a World Sailing Class.

The boat was previously constructed from polypropylene, and now is roto moulded, which is popular as a racing boat or for sail training.

The class association (ITCA) organises racing events, which range from small travellers to major championships. The Royal Yachting Association run squads alongside the events; in these squads young sailors who are given specialist race coaching. It is sailed widely among junior sailors in the UK and Ireland and there is a growing fleet in China.

Class history and design

The Topper was designed by Ian Proctor in 1977 as a One-Design racing boat. The Topper was initially manufactured and developed by John Dunhill of J V Dunhill Boats Ltd and has been in continuous production for over four decades and over 49,000 examples have now been sold. The Topper was originally designed with a glass reinforced plastic (GRP) hull making it a relatively light but durable boat, however, it was later decided that the Topper should be constructed with injection moulding, using polypropylene, which is less expensive but heavier and less rigid.

In 2021, the injection mould was damaged beyond repair and would have required replacement. As this was not financially viable, the boat was redesigned to be rotomoulded in polyethylene meaning the iconic red colour on the deck had to be replaced with hull colour. The new version was introduced in 2023.

thumb|left|Toppers at the 2006 National Championships, [[Weymouth and Portland National Sailing Academy|WPNSA]]

Although the Topper was originally rigged with an aft mainsheet, since 2004 the option to use a centre main has been allowed. The motivation for such a change being that most other dinghies, including the ones Topper sailors are likely to advance to, are rigged with centre mainsheets. which can optionally be used in favour of the standard 5.3 m<sup>2</sup> sail. The smaller sail is more efficient than a larger sail that is reefed. The first 4.2m² national championships were held in 2010.

At 11' the Topper is named for the ability to transport it on the roof of a car, and the mast splits into two sections, allowing the spars to be stored and transported.