USA terms, DK, 4mm Hook
It could be made into a giant flower by using 2 strands of DK or super chunky and a bigger hook
made in DK it is approximately hand size
Chain 4, sl st into a circle
Round 1: 16 dc into circle, sl st to complete round
Round 2: chain 4 as first spoke and top, *dcin next st, 2ch,* repeat from * to * until you have 16 'spokes', sl st to complete round
Round 3: 2 sc in each chain space,
sl st to complete round
Round 4: attach yarn over a spoke, 1dc in the 4sts,
ch 4, making to make a loop or hole,
1dc in the next 4 sts,
repeat until you have 8 loops
Round 5: attach yarn between the 4 dc
9dc into the loop or hole
sl st between the 4dc, to anchor the petal
repeat until you have 8 petals, sl st to complete flower
these hand size flowers can be joined together in rows, side by side to make a blanket wrap or jacket
A quick pic tutorial....click to make bigger
Happy Hooking
Sue x
UPDATE: Adding a picture of the first 8 petal flower I made, using 2 strands of DK
and it made a very big flower if I remember correctly I used a 6mm hook too
A picture of the variations I tried of the fillers.

and the even bigger FLOWER BATH MAT I made with this pattern
and several strands of DK
LINK TO PATTERN HERE

I went on to make an even bigger mat with the same pattern.