Birth–11 monthsNumerical PatternsShape, Space and Measure (no distinct 2021 ELG)
Recognises big things and small things in meaningful contexts.
Observe whether the child: recognises big things and small things in meaningful contexts.
What it looks like
Three ways this behaviour shows up as a child grows. Each level includes everyday moments to watch for.
Emerging
Just starting
The baby sometimes shows different attention or action when size differences are very obvious (longer looking at big item, different grasp attempt), but this is inconsistent and may depend on mood or novelty. Recognition is not yet robust across contexts.
What you might see
When offered a large ball and a small ball, the baby reaches without a consistent pattern and does not adjust grasp/hand use.
The baby shows no noticeable change in looking time or excitement when the adult swaps a small toy for a much bigger one.
The baby attempts the same grasp on a big object as on a small one without adjusting (e.g., single-finger touch only, no re-attempt).
The baby sometimes uses two hands for the bigger object but not consistently across repeats.
The baby looks longer at a large, high-contrast object than a small one on one day but not the next.
The baby changes grip (opens hand wider) for a bigger object occasionally, especially when the object is very familiar.
Expected
On track
The baby shows more consistent size-sensitive behaviour in familiar routines (e.g., adjusts reach/grasp for bigger vs smaller items, shows preference patterns) when presented with a clear contrast. They respond as if they notice “big vs small” even without words.
What you might see
Across several tries, the baby more often reaches with two hands for the larger toy and one hand for the smaller toy.
The baby widens their hand and adjusts approach when the adult presents a larger object compared with a smaller one.
The baby shows different play actions: bangs a bigger object and manipulates a smaller object with fingers.
Exceeding
Going further
The baby reliably distinguishes big and small in meaningful contexts through observable actions (e.g., two-hand vs one-hand reach, wider grasp, choosing a larger item when it better fits the action). Responses are repeatable across several routines.
What you might see
The baby consistently selects a grasp strategy that matches size (two-handed lift for big, finger/palm grasp for small) across different objects.
When offered both, the baby chooses the larger object to roll/bang and the smaller object to hold/inspect with finer finger movements.
The baby repeatedly shows clear size-based anticipation (reaches early and opens hand wider) when the larger object is presented.
In a new environment with new toys, the baby quickly adapts reach/grasp based on size without needing repeated exposure.
The baby purposefully switches strategies after a mismatch (tries one-hand grasp on big object, then immediately adds second hand).
The baby shows size-based selection in a simple problem (chooses a smaller object to put in a cup, chooses a bigger object to bang).
Try this at home
Small everyday moments where you can notice this behaviour without setting up anything special.
During play, offer a clearly big toy and a clearly small toy at the same distance. Notice whether your baby reaches with two hands for the big one and one hand for the small one across a few repeats.
In the bath, give a big cup and a small cup. Watch whether your baby chooses different actions (big cup to splash/pour, small cup to hold/inspect) and adjusts grasp size.
At story time with picture books, point to a big object and a small object on the page and say “big”/“small”; notice whether your baby looks to the indicated item and shows interest shifts when you switch.
At mealtime (supervised), show a big spoon and a small spoon and observe whether your baby reaches differently (hand opening wider, using two hands) and whether behaviour is repeatable.
In everyday routines, narrate size contrasts (“big towel”, “small sock”) and notice whether your baby anticipates the matching item when it appears (e.g., reaches earlier for the bigger item).
Connected behaviours
Behaviours that scaffold, follow, or co-emerge with this one.
The framework source and supporting developmental research.
Framework source
Development Matters in the EYFS (2012) (DM2012) — Mathematics: Shape, space and measure (age band statements).
The framework defines early size recognition as an observable behaviour grounded in meaningful everyday experiences and repeated routines.
Developmental research
Gibson, E. J. (1969). Principles of Perceptual Learning and Development.
Perceptual learning perspectives support observable progression from variable attention to more stable discrimination of object properties such as size.
Five-level rubric (detailed)ShowHide
The full progression underlying the three levels above. Used by the platform’s reasoning agent when planning activities and observations.
Not Yet
The baby does not show a consistent difference in attention or action when presented with a clearly big vs small object in a familiar situation. Responses are mainly driven by immediate sensory interest rather than size contrast.
When offered a large ball and a small ball, the baby reaches without a consistent pattern and does not adjust grasp/hand use.
The baby shows no noticeable change in looking time or excitement when the adult swaps a small toy for a much bigger one.
The baby attempts the same grasp on a big object as on a small one without adjusting (e.g., single-finger touch only, no re-attempt).
Emerging
The baby sometimes shows different attention or action when size differences are very obvious (longer looking at big item, different grasp attempt), but this is inconsistent and may depend on mood or novelty. Recognition is not yet robust across contexts.
The baby sometimes uses two hands for the bigger object but not consistently across repeats.
The baby looks longer at a large, high-contrast object than a small one on one day but not the next.
The baby changes grip (opens hand wider) for a bigger object occasionally, especially when the object is very familiar.
Developing
The baby shows more consistent size-sensitive behaviour in familiar routines (e.g., adjusts reach/grasp for bigger vs smaller items, shows preference patterns) when presented with a clear contrast. They respond as if they notice “big vs small” even without words.
Across several tries, the baby more often reaches with two hands for the larger toy and one hand for the smaller toy.
The baby widens their hand and adjusts approach when the adult presents a larger object compared with a smaller one.
The baby shows different play actions: bangs a bigger object and manipulates a smaller object with fingers.
Secure
The baby reliably distinguishes big and small in meaningful contexts through observable actions (e.g., two-hand vs one-hand reach, wider grasp, choosing a larger item when it better fits the action). Responses are repeatable across several routines.
The baby consistently selects a grasp strategy that matches size (two-handed lift for big, finger/palm grasp for small) across different objects.
When offered both, the baby chooses the larger object to roll/bang and the smaller object to hold/inspect with finer finger movements.
The baby repeatedly shows clear size-based anticipation (reaches early and opens hand wider) when the larger object is presented.
Reflexive
The baby flexibly applies size recognition across new objects and settings, quickly adapting reach/grasp strategy and showing purposeful selection based on size (e.g., consistently chooses the smaller item to hold in one hand, the larger item to bang/roll). They may show expectation when offered an “impossible” size (e.g., trying to fit a big object into a small container) by pausing or changing strategy.
In a new environment with new toys, the baby quickly adapts reach/grasp based on size without needing repeated exposure.
The baby purposefully switches strategies after a mismatch (tries one-hand grasp on big object, then immediately adds second hand).
The baby shows size-based selection in a simple problem (chooses a smaller object to put in a cup, chooses a bigger object to bang).
