Colors can def make a difference, basically i just keep changing until they start catching haha

Cant help ya on the weights as i only fish from the tinny !

 Ok cool are the bright colours better 

 bright day, bright  jig

dark day, dark jig.

Then I mix it up on the day if that dont work. 2.5 and 3.0 are the sizes that make up my collection.

Good luck, and enjoy the squidding.

 I turn to this in times of trouble seems to go alright

I got 5 for $10 last week from the Leach Hwy store in Myaree. Got a range of colours, all size 3 I think. I find these are the best to start with and you can use them in a range of depths at that size quite well, although the 2.5's are sweet for some of the shallower weed sections around the sound for example. In terms of land based, size 3, pink and orange tend to be a better bet than other colours I reckon, although don't just buy the one colour as Vinesh said you gotta sometimes swap til one works. 

 Thanks guys that's very helpfully is there a better time to catch them or is it just when they are around

 3-3.5

Black, White, and Pink colours I have loads of success with. 

 2.5-3 might need to go heavier if casting into a strong wind.

If I had to pick one colour to fish it would definitely be pink, caught more on that colour than all others combined

 Orange did the job this morning

 Lemons or the white sephia jigs do the damage

 As a generla rule for Landbased, the staff here prefer to use white, black or orange jigs depending on the time of the day. Darker colours when there is less light around.

In regards to size and brand, you cannot really go wrong with yamashita or harimitsu for a good quality jig, as well as the shimano sephia for a slighter cheaper option. 

If fishing from the rockwalls, a 3.0 to 3.5 will be suffice. 

Cheers!

CACW Nedlands